{"title":"NEW RELEASES-2026\/1012","description":null,"products":[{"product_id":"pre-sale-douk-audio-tx1-word-clock","title":"Douk Audio TX1 Word Clock with 9 Display Modes, Music Spectrum","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"4\"\u003e\u003cspan\u003eRead Time in a New Way: More than a traditional clock, TX1 shows time in readable phrases or a classic digital display with second-level accuracy, making it more intuitive, engaging, and visually striking. A unique word clock that instantly elevates your desk, bedroom, office, studio, or living room.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"5\"\u003e\u003cspan\u003eVisual Modes for Every Mood: With 9 display modes, TX1 can be a clear clock during work, a sound-reactive spectrum display during music playback, or a playful animated accent for gaming and relaxation, making one clock feel practical, expressive, and never boring.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eCustom Vibe and Glow: With 7 color styles and 5 brightness levels, TX1 adapts to how and where you use it. Pick a clean single-color look for focused moments, a multicolor style for RGB gaming setups, or a lower brightness level for bedside and late-night use without harsh glare.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFlexible Placement For Any Setup: TX1 gives you more ways to display it, from a desktop clock to a wall, pegboard, or magnetic surface. The support rod offers two viewing angles, the metal bracket adds height and tilt adjustment, and three USB-C ports keep cable routing neat.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003ePrecision Meets Design: The RX8025-T RTC keeps time accurate within 30 seconds per year and retains time for up to one month after power loss. CNC aluminum and black tempered glass front create a sleek, durable clock for daily use and a distinctive gift.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Douk Audio","offers":[{"title":"US \/ Without Stand","offer_id":47960661917928,"sku":"XX-TX1-US","price":79.99,"currency_code":"USD","in_stock":true},{"title":"US \/ With Stand","offer_id":47960661950696,"sku":"XX-TX1-ZJ-US","price":99.99,"currency_code":"USD","in_stock":true},{"title":"UK \/ Without Stand","offer_id":47960661983464,"sku":"XX-TX1-UK","price":79.99,"currency_code":"USD","in_stock":true},{"title":"UK \/ With Stand","offer_id":47960662016232,"sku":"XX-TX1-ZJ-UK","price":99.99,"currency_code":"USD","in_stock":true},{"title":"EU \/ Without Stand","offer_id":47960662049000,"sku":"XX-TX1-DE","price":79.99,"currency_code":"USD","in_stock":true},{"title":"EU \/ With Stand","offer_id":47960662081768,"sku":"XX-TX1-ZJ-DE","price":99.99,"currency_code":"USD","in_stock":true},{"title":"AU \/ Without Stand","offer_id":47960662114536,"sku":"XX-TX1-AU","price":79.99,"currency_code":"USD","in_stock":true},{"title":"AU \/ With Stand","offer_id":47960662147304,"sku":"XX-TX1-ZJ-AU","price":99.99,"currency_code":"USD","in_stock":true},{"title":"China \/ Without Stand","offer_id":47960662180072,"sku":"XX-TX1","price":79.99,"currency_code":"USD","in_stock":true},{"title":"China \/ With Stand","offer_id":47960662212840,"sku":"XX-TX1-ZJ","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/0_532a9561-e338-4091-81e7-e6b1dea32c18.jpg?v=1779864651"},{"product_id":"douk-audio-bass-shaker-amplifier-for-tactile-transducer-subwoofer-100w","title":"Douk Audio G100 Bass Shaker Amplifier for Tactile Transducer\/Subwoofer 100W","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli data-end=\"561\" data-start=\"190\"\u003e\n\u003cspan\u003eBuilt for Real Tactile Bass:\u003cstrong data-end=\"224\" data-start=\"190\"\u003e \u003c\/strong\u003ePurpose-built bass shaker amplifier for tactile transducers. Designed to drive Douk Audio BS-1\/BS-2 and similar bass shakers, the G100 provides dedicated low-frequency power for adding more physical feedback to gaming chairs, home theater seats, sofas, and sim racing rigs.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli data-end=\"933\" data-start=\"563\"\u003e\u003cspan\u003eFlexible BTL\/PBTL Output Modes:\u003cstrong data-end=\"600\" data-start=\"563\"\u003e \u003c\/strong\u003eUse BTL mode to power two bass shakers with 50W×2 output for wider tactile coverage, or switch to PBTL mode for 100W×1 mono output to drive one shaker with stronger, more focused impact. Also supports passive subwoofers for more flexible setups.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli data-end=\"1294\" data-start=\"935\"\u003e\u003cspan\u003eAdjustable Low-Pass Filter:\u003cstrong data-end=\"968\" data-start=\"935\"\u003e \u003c\/strong\u003eThe 50–300Hz adjustable low-pass filter lets you control the bass range sent to your shaker, helping focus on deep effects like engines, explosions, impacts, and cinematic bass while reducing unwanted higher-frequency vibration for cleaner, tighter feedback.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli data-end=\"1653\" data-start=\"1296\"\u003e\u003cspan\u003eRCA and Bluetooth 5.3 Input:\u003cstrong data-end=\"1336\" data-start=\"1296\"\u003e \u003c\/strong\u003eConnect easily by RCA input from a TV, computer, audio player etc. or use Bluetooth 5.3 to receive wireless signals from phones, tablets, and computers. Bluetooth reset is also supported for easy reconnection. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli data-end=\"2051\" data-start=\"1655\"\u003e\u003cspan\u003eStable Build for Long Sessions: Optimized circuit design, upgraded heat dissipation, and quality components help maintain stable low-frequency output during long sessions. Its compact aluminum chassis fits beside your audio system, under a seat, or in tight spaces.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp data-end=\"308\" data-start=\"65\"\u003e\u003cstrong data-end=\"119\" data-start=\"65\"\u003eQ: Can the G100 be used as a full-range amplifier?\u003c\/strong\u003e\u003cbr data-end=\"122\" data-start=\"119\"\u003e\u003cstrong data-end=\"128\" data-start=\"122\"\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eNo. The G100 is designed for low-frequency output, not for driving regular full-range speakers. All outputs are limited to low-frequency signals by design and are optimized for subwoofer or bass shaker applications.\u003c\/p\u003e\n\u003cp data-end=\"668\" data-start=\"310\"\u003e\u003cstrong data-end=\"391\" data-start=\"310\"\u003eQ: What is the difference between BTL and PBTL modes? Which one should I use?\u003c\/strong\u003e\u003cbr data-end=\"394\" data-start=\"391\"\u003e\u003cstrong data-end=\"400\" data-start=\"394\"\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBTL mode is used to connect two passive subwoofers or bass shakers, with 50W×2 output at 4Ω. PBTL mode is used to connect one passive subwoofer or bass shaker with higher output, with 100W×1 output at 2Ω. Use the appropriate mode based on your setup and requirements.\u003c\/p\u003e\n\u003chr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: G100\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio Input: Bluetooth 5.3 \/ RCA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio Output: Speaker Output (BTL \/ PBTL)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eChips: TPA3116D2 + 4 × NE5532 (surface-mount)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMax Output Power: BTL: 50W × 2 @ 4Ω; PBTL: 100W × 1 @ 2Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMatched Speaker Impedance: BTL: 4–8Ω; PBTL: 2–8Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLow-Pass Filter Adjustment Range: 50Hz–300Hz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLow-Pass Filter Slope: 24 dB\/octave\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTHD+N: 0.19%\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSNR: ≥101dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput Sensitivity: RCA: 0.22V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput Voltage: DC 15–24V (5.5 × 2.5mm)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W × D × H): 124 × 114 × 33mm \/ 4.88 × 4.48 × 1.29in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage Dimensions (W × D × H): 250 × 220 × 60mm \/ 9.84 × 8.66 × 2.36in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet Weight: 507g \/ 1.12lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage Weight: 1.0kg \/ 2.20lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking List\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* G100\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* DC 24V Power Adapter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Bluetooth Antenna\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":48534448406760,"sku":"SUC-G100-US","price":72.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":48534448439528,"sku":"SUC-G100-UK","price":72.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":48534448472296,"sku":"SUC-G100-DE","price":72.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":48534448505064,"sku":"SUC-G100-AU","price":72.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":48534448537832,"sku":"SUC-G100","price":72.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/2_a320d16a-be0f-40fc-be32-ae7cca9dd0d9.jpg?v=1778464308"},{"product_id":"douk-audio-bs-2-30w-bass-shaker","title":"Douk Audio BS-2 30W Bass Shaker","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003eFeatures:\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli data-end=\"853\" data-start=\"514\"\u003e\u003cspan\u003eTactile Bass You Can Feel: The Douk Audio BS-2 is a bass shaker \/ tactile transducer designed to turn low-frequency signals into physical vibration. Feel bass effects from games, movies, music, home theater and sim racing with an added layer of tactile impact beyond regular audio playback. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"1180\" data-start=\"855\"\u003e\u003cspan\u003eEfficient 30W Output: Rated at 30W power with 4Ω impedance, the BS-2 is built for efficient low-frequency performance. Its high-sensitivity structure helps deliver strong physical feedback when paired with the Douk Audio G100 or a compatible amplifier.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"1540\" data-start=\"1182\"\u003e\u003cspan\u003eEngineered Internal Structure: Built with a high-strength ferrite magnet, precision voice coil, and optimized internal structure, the BS-2 responds quickly to low-frequency effects such as engines, explosions, impacts, and deep bass notes, making the feedback feel more direct and controlled.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"2248\" data-start=\"1884\"\u003e\u003cspan\u003eDurable for Daily Use: The rigid aluminum housing helps resist heat, impact, and deformation while improving heat dissipation during extended sessions. Reliability testing for load, humidity, temperature, vibration, and drop performance helps support stable long-term use.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"2248\" data-start=\"1884\"\u003e\u003cspan\u003eFlexible DIY Setup: Build your own tactile setup with one or multiple BS-2 units, and try different mounting positions to match your chair, sofa, bed frame, or platform. Different surfaces and locations can create different tactile effects, letting you explore the best tactile response.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003e\u003cspan\u003eQ: Can the BS-2 be used as a regular speaker?\u003c\/span\u003e\u003c\/strong\u003e\u003cstrong data-end=\"147\" data-start=\"69\"\u003e\u003cbr data-end=\"1197\" data-start=\"1194\"\u003e\u003cspan\u003e\u003cstrong data-end=\"1203\" data-start=\"1197\"\u003eA:\u003c\/strong\u003e \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003eNo. It is designed for low-frequency tactile feedback, not full-range sound playback.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp data-end=\"615\" data-start=\"358\"\u003e\u003cstrong\u003e\u003cspan\u003eQ: What amplifier should I use with the BS-2?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr data-end=\"411\" data-start=\"408\"\u003e\u003cspan\u003e\u003cstrong data-end=\"417\" data-start=\"411\"\u003eA:\u003c\/strong\u003e Use a bass shaker amplifier or compatible subwoofer amp with low-pass filter, such as the Douk Audio G100. A regular 4Ω amp can also drive it, but the vibration effect may be less ideal with full-range signals.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"864\" data-start=\"617\"\u003e\u003cstrong\u003e\u003cspan\u003eQ: How much amplifier power is safe for the BS-2?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr data-end=\"681\" data-start=\"678\"\u003e\u003cspan\u003e\u003cstrong data-end=\"687\" data-start=\"681\"\u003eA:\u003c\/strong\u003e The BS-2 is rated at 30W, with 50W max input power and 4Ω impedance. Do not exceed 50W per unit. For long-term use, keeping output closer to 30W is recommended.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"1117\" data-start=\"866\"\u003e\u003cstrong\u003e\u003cspan\u003eQ: Can I connect multiple BS-2 units together?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr data-end=\"920\" data-start=\"917\"\u003e\u003cspan\u003e\u003cstrong data-end=\"926\" data-start=\"920\"\u003eA:\u003c\/strong\u003e Yes, but total impedance changes with wiring. Two units in series equal about 8Ω, while two in parallel equal about 2Ω. Always confirm your amplifier supports the final impedance before use.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: BS-2\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRated Impedance: 4Ω ±15%\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRated Input Power: 30W\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMax. Input Power: 50W\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eResonance Frequency (F0): 57–63Hz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSound Pressure Level: 62 ±3dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOperating Temperature: -20℃ to +70℃\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eStorage Temperature: -30℃ to +70℃\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eProduct Dimensions: 86 × 89.7 × 38.5mm \/ 3.38 × 3.53 × 1.51in\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet Weight: 532g \/ 1.17lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage Weight \u003cem\u003e(Single Unit)\u003c\/em\u003e: 640g \/ 1.41lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage Weight \u003cem\u003e(Pair)\u003c\/em\u003e: 1.17kg \/ 2.58lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003chr\u003e\n\u003cp\u003ePacking List\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1 × BS-2 Bass Shaker \u003cem data-end=\"93\" data-start=\"71\"\u003e(Single Unit Option)\u003c\/em\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e2 × BS-2 Bass Shakers \u003cem data-end=\"137\" data-start=\"122\"\u003e(Pair Option)\u003c\/em\u003e  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Douk Audio","offers":[{"title":"1PC \/ US","offer_id":48534747644136,"sku":"SUC-BS-2-US","price":36.99,"currency_code":"USD","in_stock":true},{"title":"1PC \/ UK","offer_id":48534747676904,"sku":"SUC-BS-2-UK","price":36.99,"currency_code":"USD","in_stock":true},{"title":"1PC \/ EU","offer_id":48534747709672,"sku":"SUC-BS-2-DE","price":36.99,"currency_code":"USD","in_stock":true},{"title":"1PC \/ AU","offer_id":48534747742440,"sku":"SUC-BS-2-AU","price":36.99,"currency_code":"USD","in_stock":true},{"title":"1PC \/ China","offer_id":48534747775208,"sku":"SUC-BS-2","price":36.99,"currency_code":"USD","in_stock":true},{"title":"1Pair \/ US","offer_id":48550625738984,"sku":"SUC-BS-2-Pair-US","price":69.99,"currency_code":"USD","in_stock":true},{"title":"1Pair \/ UK","offer_id":48550625771752,"sku":"SUC-BS-2-Pair-UK","price":69.99,"currency_code":"USD","in_stock":true},{"title":"1Pair \/ EU","offer_id":48550625804520,"sku":"SUC-BS-2-Pair-DE","price":69.99,"currency_code":"USD","in_stock":true},{"title":"1Pair \/ AU","offer_id":48550625837288,"sku":"SUC-BS-2-Pair-AU","price":69.99,"currency_code":"USD","in_stock":true},{"title":"1Pair \/ China","offer_id":48550625870056,"sku":"SUC-BS-2-Pair","price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/6_90ec2072-135a-479d-bf92-1cf274246505.jpg?v=1778478131"},{"product_id":"douk-audio-d2-15w-hifi-linear-power-supply-with-dc-usb-5v-output","title":"Douk Audio D2 15W HiFi Linear Power Supply with DC+USB 5V Output","description":"\u003cdiv\u003e\u003cstrong\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"8\"\u003e\u003cspan\u003e\u003cstrong data-end=\"307\" data-start=\"279\"\u003eCleaner 5V Linear Power:\u003c\/strong\u003e Replaces ordinary switching power adapters with clean, stable 5V DC power. The D2 helps reduce power-related noise and interference, giving your HiFi system a darker background, smoother highs, and more natural detail.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"9\"\u003e\u003cspan\u003e\u003cstrong\u003eUltra-Low Ripple Output\u003c\/strong\u003e: With ripple noise below 20μV under no-load conditions, 15W output power, and up to 2.5A current, the D2 provides a low-noise power foundation for sensitive audio circuits that require stable 5V supply.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong data-end=\"581\" data-start=\"553\"\u003eDual Output Convenience\u003c\/strong\u003e: Equipped with 1×USB-A and 1×DC output, the D2 can power two compatible 5V devices at the same time. Ideal for DACs, DDCs, Raspberry Pi, USB audio devices, and headphone amps etc.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"10\"\u003e\u003cspan\u003e\u003cstrong\u003eStable Power Architecture\u003c\/strong\u003e: Built with a custom sealed transformer, LM1085IT voltage regulator, Panasonic FM capacitors, and PTC resettable fuse. The design helps deliver steady 5V output, low-ripple DC power, and added circuit protection.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"12\"\u003e\u003cspan\u003e\u003cstrong\u003eCompact Aluminum Chassis\u003c\/strong\u003e: The CNC-machined aluminum chassis offers solid durability, better heat dissipation, and helps reduce external interference. Compact and stack-friendly, the D2 fits neatly into desktop HiFi, PC audio, and small home audio systems.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eQ: The D2 has two output terminals. Can both terminals be used simultaneously at full rated current?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: No. You can connect two output devices at the same time, but the total current drawn from both outputs must not exceed the rated output current.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eQ: The DC output jack is 5.5mm\/2.5mm, and my device's power jack is 5.5mm\/2.1mm. Are they compatible?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: Yes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eQ: Is the output voltage of the D2 adjustable?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: The output voltage is typically fixed and can only be fine-tuned within about ±0.5V. Normally no adjustment is required.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eQ: If I connect two devices to the D2 at the same time, will ground noise occur?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: It depends on the connected devices. If ground noise occurs when powering two devices, we recommend using the D2 to power only one device. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eQ: My device requires a 5V \/ 1A power supply. Can I safely use the D2 5V \/ 2.5A output?  \u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: Yes. 2.5A is the maximum available current. Your device will only draw the current it needs, so it can be used safely.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eQ: Why do the D2 generate more heat than switching power supplies? Is it safe?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: It is normal. Linear power supplies operate at lower efficiency, so more energy is converted into heat. The D2 is safe when used within rated load limits.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: D2\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOutput Interface: DC \/ USB Port\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOutput Voltage: DC 5V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOutput Power: 15W\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRated Output Current: 2.5A\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRipple Noise: No load \u0026lt;20μV\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDC Output Connector: 5.5 × 2.5 mm, positive inside and negative outside, compatible with 5.5 × 2.1 mm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput Voltage: AC 110V–120V \/ AC 220V–240V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W × D × H): 125 × 80 × 40 mm \/ 4.92 × 3.15 × 1.57 in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet Weight: 600 g \/ 1.32 lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage Weight: 900 g \/ 1.98 lb \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003cspan\u003ePacking List\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* D2\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* DC Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Power Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":48560181608680,"sku":"LHY-D2-US","price":89.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":48560181641448,"sku":"LHY-D2-UK","price":89.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":48560181674216,"sku":"LHY-D2-DE","price":89.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":48560181706984,"sku":"LHY-D2-AU","price":89.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":48560181739752,"sku":"LHY-D2","price":89.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/9_d5a62d27-aaa6-4c48-82c1-dcad714890e8.jpg?v=1778824457"},{"product_id":"douk-audio-t12-hifi-tube-phono-preamp-for-mm-mc-turntables-headphone-amp-with-vu-meter","title":"Douk Audio T12 Tube Phono Preamp MM\/MC Turntable Headphone Amp","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli data-end=\"435\" data-start=\"194\"\u003e\u003cspan\u003eDisplay-Worthy Vintage Design: Real walnut housing, glowing tubes, and retro sliders give T12 the warm, nostalgic look of classic audio gear, turning a practical tube preamp into a refined HiFi piece that feels at home beside turntables, speakers, and records.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"662\" data-start=\"437\"\u003e\u003cspan\u003ePhono and Line-In Flexibility: Works with MM and MC turntable setups for vinyl playback, while the RCA line input connects CD players, DACs, streamers, or other analog sources, letting T12 serve as both a phono stage and tube preamp for everyday HiFi listening.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"881\" data-start=\"664\"\u003e\u003cspan\u003eBring Out the Tube Warmth: A 120V tube stage helps the 6J5B-Q tubes open up with a smoother, fuller analog tone. Along with low THD and high SNR, T12 gives vocals more body, music a warmer flow, and playback a cleaner foundation.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003eTune Sound by Sight and Touch: Bass and treble adjust up to ±10dB, with center-detent sliders for an easy return to neutral. The visible slider positions are easy to read at a glance, helping you fine-tune sound for different records, speakers, rooms, or personal taste.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"1112\" data-start=\"883\"\u003e\u003cspan\u003eOutput Switching Made Easy: Dual RCA outputs let you switch between two amplifier or powered speaker systems for quick comparison or daily listening, without the hassle of repeated unplugging. The 3.5mm headphone output makes late-night personal listening easier.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":48585375449320,"sku":"XX-T12-US","price":109.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":48585375482088,"sku":"XX-T12-UK","price":109.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":48585375514856,"sku":"XX-T12-DE","price":109.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":48585375547624,"sku":"XX-T12-AU","price":109.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":48585375580392,"sku":"XX-T12","price":109.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/0_efd1e6c3-2780-4d30-b746-bc5b2f2f53b0.jpg?v=1779698141"},{"product_id":"douk-audio-d2-pro-dc-12v-linear-power-supply-low-noise-35w","title":"Douk Audio D2-PRO 35W Linear Power Supply with Dual DC 12V OUT","description":"\u003cdiv\u003e\u003cstrong\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli data-end=\"3038\" data-start=\"2738\" data-section-id=\"1lkp4wv\"\u003e\u003cspan\u003eCleaner Linear Power Upgrade: Ordinary switching adapters can introduce ripple, electrical noise, and interference into sensitive audio gear. As a linear power supply, the D2-PRO helps create a darker background, smoother highs, and cleaner detail for a more refined listening experience.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"3324\" data-start=\"3040\" data-section-id=\"155koxo\"\u003e\u003cspan\u003e28μV Ultra-Low Ripple: Ripple noise is measured at only 28μV RMS under no-load conditions, giving sensitive audio circuits a cleaner power foundation. By reducing power-related noise at the source, it supports steadier imaging, cleaner dynamics, and more natural detail. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"3576\" data-start=\"3326\" data-section-id=\"1m1di7a\"\u003e\u003cspan\u003eLow-Noise Power Architecture: A sealed toroidal transformer, EMI suppression circuit, high-speed rectifier, large-capacity matrix filtering, and LDO regulator work together to isolate grid interference, smooth DC output, and deliver stable, well-regulated DC power.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"3843\" data-start=\"3578\" data-section-id=\"ypninp\"\u003e\u003cspan\u003e35W Dual DC Output: With up to 35W output power and 2.5A current capacity, the D2-PRO can run one or two compatible devices from the same clean regulated source. Dual DC outputs help create a more consistent low-noise power setup for compact HiFi systems.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"1526\" data-start=\"1260\" data-section-id=\"xwcji6\"\u003e\u003cspan\u003eMade for HiFi Audio Systems: Designed for 12V DACs, preamps, headphone amps, streamers, digital interfaces, audio switches, and network switches. The aluminum chassis helps improve heat dissipation and reduce external interference for stable daily use.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":48612941037800,"sku":"LHY-D2-PRO-US","price":129.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":48612941070568,"sku":"LHY-D2-PRO-UK","price":149.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":48612941103336,"sku":"LHY-D2-PRO-DE","price":149.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":48612941136104,"sku":"LHY-D2-PRO-AU","price":149.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":48612941168872,"sku":"LHY-D2-PRO","price":149.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/1_8e979cae-0b14-4f1c-8fca-bdb96c9de4d5.jpg?v=1780452409"},{"product_id":"douk-audio-f3-hifi-tube-amplifier-class-a-single-ended-stereo-audio-amp","title":"Douk Audio F3 HiFi Tube Amplifier Class A Single-Ended Stereo Audio Amp","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eSingle-ended Class A Tube Amp: The F3 uses a single-ended Class A tube circuit for smooth, continuous amplification, helping vocals sound softer, instruments more textured, and music more relaxed. Connect RCA line sources such as DACs, CD players, or streamers for a warm HiFi listening experience.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eClassic Analog Tube Sound: GE 6DK6 driver tubes help shape clear mids and vocal presence, while Valvo PL84 output tubes add warmth, rich harmonics, and natural tube character. Together, they create an analog tube sound that balances clarity, texture, and long-session listening comfort.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eRefined 3.2W × 2 Class A Output: With 3.2W × 2 of pure Class A power, the F3 is tuned for high-sensitivity passive bookshelf speakers. Its smooth output character gives vocals more body, preserves natural dynamics, and keeps music relaxed, coherent, and easy to enjoy.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eReal-Time Music Spectrum Display: Watch your music come to life on the front spectrum display. Vibrant visual feedback matches the glowing tubes, giving you an immersive, analog-inspired experience that engages sight and hearing together, turning every track into a small performance. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eHandcrafted Wood Cabinet: Each F3 features a handcrafted wood cabinet with natural grain, making every unit unique. Compact and elegant, it blends seamlessly into your desktop or HiFi setup, adding tactile warmth and a refined, vintage feel to your listening environment. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003eQ: Why does my F3's wooden finish look slightly different from the pictures?\u003cbr data-end=\"146\" data-start=\"143\"\u003eA: The F3 features a real wood cabinet, handcrafted for each unit. Natural grain and color variations may occur, and minor cosmetic imperfections are normal, making each amplifier unique.  \u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eQ: Can I power on the F3 without speakers connected?\u003c\/span\u003e\u003cbr data-end=\"167\" data-start=\"164\"\u003e\u003cspan\u003eA: No. Always connect speakers before powering on. Operating without a load may damage the output transformer.  \u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Can I leave the volume knob at my usual listening position when turning the F3 on or off?\u003cbr data-end=\"394\" data-start=\"391\"\u003eA: No. Always set the volume knob to minimum before power on and power off to protect the tubes and internal circuitry.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Why does the F3 sound tight or thin right after turning on?\u003cbr data-end=\"1246\" data-start=\"1243\"\u003eA: This is normal. Tubes require 30–60 minutes to reach proper operating temperature, after which sound becomes smoother and more natural.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Some tube sockets appear to have missing pin contacts. Is this a defect?\u003cbr data-end=\"1484\" data-start=\"1481\"\u003eA: No. Some ceramic tube sockets are designed without contacts for unused tube pins. It does not affect performance.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Can I upgrade or replace tubes with other models?\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eA: No. Using other types may damage the F3. The model of the supplied tubes may vary depending on the production batch, which is normal. Please refer to the actual product received.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: F3\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio Input: Stereo RCA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio Output: Banana Speaker Jacks\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eVacuum Tubes: PL84 × 2, 6DK6 × 2\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOutput Power: 3.2W × 2\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOutput Impedance: 4Ω \/ 8Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSNR: ≥ 85 dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTHD (at rated power): ≤ 7%\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFrequency Response: 30Hz – 20kHz (±3dB)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput Sensitivity: 500mV – 2V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRated Power Consumption: 42W\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput Voltage: AC 100–240V, 50\/60Hz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W × D × H): 180 × 144 × 115 mm \/ 7.09 × 5.67 × 4.53 in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet Weight: 2.5 kg \/ 5.51 lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage Weight: 2.9 kg \/ 6.39 lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking List\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1 × F3\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e2 × 6DK6 Tubes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e2 × PL84 Tubes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1 × Power Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":48629369831656,"sku":"DZ115-US","price":299.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":48629369864424,"sku":"DZ115-UK","price":299.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":48629369897192,"sku":"DZ115-DE","price":299.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":48629369929960,"sku":"DZ115-AU","price":299.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":48629369962728,"sku":"DZ115","price":299.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/1_1c1ede67-efd4-412d-ad74-e9b7fe51a41b.jpg?v=1780905980"},{"product_id":"douk-audio-h5-hifi-tube-mm-phono-preamp-w-sub-out","title":"Douk Audio H5 Tube Preamp with LPF \/ HPF","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eA Natural Partner for A5: H5 is designed to visually and sonically complement the A5 amplifier, sharing a compact black HiFi look while adding tube warmth, MM phono input, tone control, and refined subwoofer integration for a richer, more complete stereo system.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFlexible Phono and RCA Input: Use MM Phono for MM turntables and RCA Line In for DACs, CD players, streamers, computers, and more. The 20Hz HPF helps tame unwanted vinyl rumble, keeping record playback cleaner, steadier, and more controlled. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eDual Outputs with Subwoofer Control: Dual RCA outputs let H5 feed two amplifiers or powered speakers at the same time, making it easier to expand your HiFi setup. SUB Out with 180\/250Hz LPF helps reduce boomy overlap with main speakers for fuller, cleaner, better-integrated bass.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eOptimized GE-4BZ6 Tube Character: Tuned around GE-4BZ6 tubes with 180V tube drive, H5 brings smooth warmth, rich midrange body, and natural analog depth to vocals, jazz, and vinyl playback, giving you a refined tube sound from the start without chasing tube upgrades.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eShape Sound With Refined Control: Bass and treble controls make quick sound adjustment easy, while shielded tube power and 4th-gen relay help reduce interference and switching noise. A pluggable NE5532 op-amp leaves room for experienced users to explore different sound flavors. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cstrong data-end=\"202\" data-start=\"125\"\u003eQ: Does the 20Hz high-pass filter work with all inputs?\u003cbr data-end=\"534\" data-start=\"531\"\u003eA: \u003c\/strong\u003eNo. The 20Hz HPF works only in Phono input mode. It is designed to help reduce ultra-low-frequency rumble from turntable playback, such as record warp or turntable vibration.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cstrong data-end=\"988\" data-start=\"940\"\u003eQ: What devices can be connected to SUB Out?\u003c\/strong\u003e\u003cbr data-end=\"991\" data-start=\"988\"\u003e\u003cstrong data-end=\"997\" data-start=\"991\"\u003eA:\u003c\/strong\u003e SUB Out uses a single RCA connector for powered subwoofers and sends low-frequency signals only. The LPF applies only to SUB Out. Bass and treble controls do not affect SUB Out, while the volume knob controls both RCA outputs and SUB Out together.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cstrong data-end=\"1793\" data-start=\"1751\"\u003eQ: Does H5 support op-amp replacement?\u003c\/strong\u003e\u003cbr data-end=\"1796\" data-start=\"1793\"\u003e\u003cstrong data-end=\"1802\" data-start=\"1796\"\u003eA:\u003c\/strong\u003e Yes. H5 includes one socketed NE5532 dual op-amp. You may replace it with compatible dual op-amps such as OPA2604, OPA2134, LM49720, or MUSES02.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cstrong data-end=\"1335\" data-start=\"1295\"\u003eQ: Does H5 support tube replacement?\u003c\/strong\u003e\u003cbr data-end=\"1338\" data-start=\"1335\"\u003e\u003cstrong data-end=\"1344\" data-start=\"1338\"\u003eA:\u003c\/strong\u003e Yes. H5 uses 4BZ6 tubes and supports replacement with the same 4BZ6 tube type only. Do not use other tube models unless compatibility is confirmed with us. Always power off H5 before replacing the tubes.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cstrong data-end=\"202\" data-start=\"125\"\u003eQ: Can RCA 1 and RCA 2 be switched independently?\u003cbr data-end=\"810\" data-start=\"807\"\u003eA: \u003c\/strong\u003eNo. RCA 1 and RCA 2 output the same signal simultaneously and cannot be switched independently.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cstrong data-end=\"202\" data-start=\"125\"\u003eQ: Which input should I use for a turntable with a built-in phono preamp?\u003c\/strong\u003e\u003cbr data-end=\"205\" data-start=\"202\"\u003e\u003cstrong data-end=\"211\" data-start=\"205\"\u003eA:\u003c\/strong\u003e Please connect it to the RCA input. The Phono input is designed for turntables without a built-in phono preamp. Connecting a built-in phono preamp turntable to the Phono input may cause noise, distortion, or abnormal sound.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cstrong data-end=\"2113\" data-start=\"2074\"\u003eQ: What power adapter should I use?\u003c\/strong\u003e\u003cbr data-end=\"2116\" data-start=\"2113\"\u003e\u003cstrong data-end=\"2122\" data-start=\"2116\"\u003eA:\u003c\/strong\u003e Please use the included DC 12V\/2A power adapter. If using another adapter, make sure it is a high-quality DC 12V adapter rated at 1.5A or above.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eParameters\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli data-end=\"46\" data-start=\"7\"\u003e\u003cspan\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"46\" data-start=\"7\"\u003e\u003cspan\u003eModel: H5\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"126\" data-start=\"48\"\u003e\u003cspan\u003eAudio Input: MM Phono \/ RCA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"126\" data-start=\"48\"\u003e\u003cspan\u003eAudio Output: 2× RCA Outputs \/ SUB Out\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"126\" data-start=\"48\"\u003e\n\u003cspan\u003eFrequency Response:\u003c\/span\u003e\n\u003cul\u003e\n\u003cli data-end=\"126\" data-start=\"48\"\u003e\u003cspan\u003ePhono Input: conforms to RIAA characteristics\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"126\" data-start=\"48\"\u003e\u003cspan\u003eRCA Input: 20Hz–20kHz (±0.3dB)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"285\" data-start=\"234\"\u003e\n\u003cspan\u003eTHD+N:\u003c\/span\u003e\n\u003cul\u003e\n\u003cli data-end=\"285\" data-start=\"234\"\u003e\u003cspan\u003ePhono Input: 0.15%\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"285\" data-start=\"234\"\u003e\u003cspan\u003eRCA Input: 0.5%\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"338\" data-start=\"287\"\u003e\n\u003cspan\u003eSNR:\u003c\/span\u003e\n\u003cul\u003e\n\u003cli data-end=\"338\" data-start=\"287\"\u003e\u003cspan\u003ePhono Input: ≥78dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"338\" data-start=\"287\"\u003e\u003cspan\u003eRCA Input: ≥104dB\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"399\" data-start=\"340\"\u003e\n\u003cspan\u003eInput Sensitivity:\u003c\/span\u003e\n\u003cul\u003e\n\u003cli data-end=\"399\" data-start=\"340\"\u003e\u003cspan\u003ePhono Input: 5mV\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"399\" data-start=\"340\"\u003e\u003cspan\u003eRCA Input: 1V\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"462\" data-start=\"401\"\u003e\n\u003cspan\u003eMax. Output Level:\u003c\/span\u003e\n\u003cul\u003e\n\u003cli data-end=\"462\" data-start=\"401\"\u003e\u003cspan\u003ePhono Input: 500mV\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"462\" data-start=\"401\"\u003e\u003cspan\u003eRCA Input: 2V\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"554\" data-start=\"464\"\u003e\n\u003cspan\u003eSUB Max. Output Level:\u003c\/span\u003e\n\u003cul\u003e\n\u003cli data-end=\"554\" data-start=\"464\"\u003e\u003cspan\u003e180Hz cutoff frequency: 3.2V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"554\" data-start=\"464\"\u003e\u003cspan\u003e250Hz cutoff frequency: 5.5V\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"601\" data-start=\"556\"\u003e\u003cspan\u003eHigh-Pass Filter Cutoff Frequency: 20Hz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"634\" data-start=\"603\"\u003e\u003cspan\u003eBass \/ Treble Range: ±6dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"680\" data-start=\"636\"\u003e\u003cspan\u003eInput Voltage: DC 12V ≥1.5A, 5.5 × 2.1mm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"742\" data-start=\"682\"\u003e\u003cspan\u003ePackage Size (W × D × H): 265 × 240 × 65mm \/ 10.43 × 9.45 × 2.56in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"778\" data-start=\"744\"\u003e\u003cspan\u003ePackage Weight: 0.8kg \/ 1.76lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking List\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1 × H5\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e2 × 4BZ6 Tubes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1 × DC 12V Power Supply\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1 × User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":48633224200424,"sku":"SUC-H5-US","price":89.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":48633224233192,"sku":"SUC-H5-UK","price":89.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":48633224265960,"sku":"SUC-H5-DE","price":89.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":48633224298728,"sku":"SUC-H5-AU","price":89.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":48633224331496,"sku":"SUC-H5","price":89.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/1_790b6b58-fa3a-4560-b86f-cd608f894a02.jpg?v=1781062233"},{"product_id":"douk-audio-vfd253-4-channel-audio-selector-music-spectrum-display","title":"Douk Audio VFD253-PRO 4 Channel Audio Selector Music Spectrum Display","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFlexible 4-Channel RCA Routing: Works as a 1-in-4-out distributor or 4-in-1-out selector to manage your HiFi system with less cable swapping. Send one source to one, several, or all selected outputs, or switch between multiple sources with ease. Lighted buttons show the active channel at a glance.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e25-Band VFD Spectrum Visualizer: The 25×15 VFD display turns music into real-time spectrum motion with clearer frequency layers and richer visual detail. Use line-in RCA for direct signal tracking, or built-in MIC pickup to capture nearby sound for easier visual display across more setups.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eCustomizable Spectrum Display: Multiple modes, range selection, gain, brightness, and response tuning help the spectrum stay clear, full, and engaging across different sources and listening styles. Whether the signal is weak, the room is bright, or you prefer truer response over smoother motion, you can tune the display to look right.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eDirect Isolated Signal Path: RCA input and output are directly connected without op-amp processing, keeping the audio path simple and clean. Transformer isolation separates the VFD drive circuit from the audio route, helping reduce display-related interference while preserving your original signal.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBuilt for Daily HiFi Use: The remote control gives quick access to channel selection, brightness, spectrum response, and clock settings etc. Accurate clock display adds practical desktop use, while aluminum housing and tempered glass bring a solid, refined finish to your HiFi setup. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv data-is-intersecting=\"true\" data-turn-id-container=\"df0ed69b-ad47-4d85-b708-7062d419f470\"\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv data-is-intersecting=\"true\" data-turn-id-container=\"request-6a18043f-95f8-83a9-8a9b-c12c437eb771-73\"\u003e\n\u003csection dir=\"auto\" data-turn=\"assistant\" data-scroll-anchor=\"false\" data-testid=\"conversation-turn-148\" data-turn-id-container=\"request-6a18043f-95f8-83a9-8a9b-c12c437eb771-73\" data-turn-id=\"request-6a18043f-95f8-83a9-8a9b-c12c437eb771-73\"\u003e\n\u003cdiv data-conversation-screenshot-content=\"\"\u003e\n\u003cdiv dir=\"auto\" data-turn-start-message=\"true\" data-message-model-slug=\"gpt-5-5-thinking\" data-message-id=\"c4d41c16-f844-49ae-b9be-15fe842270c9\" data-message-author-role=\"assistant\" tabindex=\"0\"\u003e\n\u003cp data-end=\"216\" data-start=\"0\"\u003e\u003cstrong\u003eQ: Can the VFD253 Pro be used as a mixer?\u003c\/strong\u003e\u003cbr data-end=\"44\" data-start=\"41\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eNo. It does not provide independent volume control for each channel. It is more suitable as an audio switcher or splitter rather than a mixer.  \u003c\/p\u003e\n\u003cp data-end=\"495\" data-start=\"218\"\u003e\u003cstrong\u003eQ: What signal does the spectrum display show?\u003c\/strong\u003e\u003cbr data-end=\"267\" data-start=\"264\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe spectrum comes from the rear I\/O port. In 1-in-4-out mode, it shows the source signal. In 4-in-1-out mode, it follows the selected input. If multiple inputs are selected, it may show combined signal, but this is not recommended.  \u003c\/p\u003e\n\u003cp data-end=\"723\" data-start=\"497\"\u003e\u003cstrong\u003eQ: What is the difference between Real Display and Smooth Display?\u003c\/strong\u003e\u003cbr data-end=\"566\" data-start=\"563\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eReal Display follows signal changes more directly for a more accurate visual response. Smooth Display offers smoother, steadier movement for better viewing.\u003c\/p\u003e\n\u003cp data-end=\"991\" data-start=\"725\"\u003e\u003cstrong\u003eQ: Why does the display switch to clock mode when there is no audio signal?\u003c\/strong\u003e\u003cbr data-end=\"803\" data-start=\"800\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThis is normal. If no audio signal is detected for about 5 seconds, the display can switch to clock mode. This function can be turned on or off by remote control.  \u003c\/p\u003e\n\u003cp data-end=\"1316\" data-start=\"993\"\u003e\u003cstrong\u003eQ: How should I power the VFD253 Pro?\u003c\/strong\u003e\u003cbr data-end=\"1045\" data-start=\"1042\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePlease use the included 5V USB power adapter. Do not power it from the same device used as the audio source, as shared grounding may cause background noise or hum.  \u003c\/p\u003e\n\u003cp data-end=\"1316\" data-start=\"993\"\u003e\u003cspan\u003e\u003cstrong\u003eQ: Does the remote control include batteries?\u003c\/strong\u003e\u003cbr data-end=\"95\" data-start=\"92\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e No. Batteries are not included for safer and faster delivery. Please prepare compatible batteries separately before use.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: VFD253 Pro\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio Input: RCA \/ MIC Pickup\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio Output: RCA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOperating Modes: 1-in-4-out \/ 4-in-1-out\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDisplay Type: VFD\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDisplay Resolution: 25 × 15\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDisplay Content: Music Spectrum \/ Clock\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDisplay Modes: 7 main display modes with sub-modes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSpectrum Range: LOW \/ MID \/ FULL\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDisplay Response: Real Display \/ Smooth Display\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAdjustments: Brightness \/ Gain \/ Sensitivity \/ Peak Hold\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eClock IC: RX8025T\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTime Accuracy: Within 1 minute per year\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRemote Control: Supported\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePower-Off Memory: Supported\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePower Input: DC 5V \/ ≥1A\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions: 172 × 107 × 70 mm \/ 6.77 × 4.21 × 2.76 in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage Dimensions (W*D*H): 200 × 185 × 98 mm \/ 7.87 ×\u003cem\u003e \u003c\/em\u003e7.28 × 3.85 in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet Weight: 650 g \/ 1.43 lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage Weight: 980 g \/ 2.16 lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking List\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* VFD253 PRO\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Power Adapter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* USB-C Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Screwdriver\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Remote Control (Without Batteries)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":48640104005864,"sku":"XX-VFD253-PRO-US","price":139.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":48640104038632,"sku":"XX-VFD253-PRO-UK","price":139.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":48640104071400,"sku":"XX-VFD253-PRO-DE","price":139.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":48640104104168,"sku":"XX-VFD253-PRO-AU","price":139.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":48640104136936,"sku":"XX-VFD253-PRO","price":139.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/1_1420dda3-9187-4cd3-a92b-1b75045b7455.jpg?v=1781259983"},{"product_id":"douk-audio-eq7-hifi-7-band-audio-equalizer-preamp-w-balanced-xlr-output","title":"Douk Audio EQ7 HiFi 7-Band Audio Equalizer Preamp w\/ Balanced XLR Output","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e7-Band EQ for Custom Sound: EQ7 stereo equalizer lets you tailor sound around your speakers, music and taste. Built for more detailed tone control, it offers seven adjustable bands from 32Hz to 10kHz with ±10dB adjustment to shape bass weight, vocal body and treble detail. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eTrue Balanced XLR Conversion: EQ7 actively converts RCA input into true balanced XLR output with positive and inverted signal phases, bridging classic RCA sources with balanced HiFi amplifiers and powered speakers through a cleaner, lower-noise signal path with better signal integrity.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDual Large VU Meters in Motion: Watch your signal come alive through classic needle movement, adding a retro feel while making music dynamics easy to see at a glance. Brightness, speed and gain controls let you fine-tune the meter glow and response to match your source level and preferred visual style.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFlexible RCA\/XLR Connectivity: Keep DAC, CD player or streamer connected through RCA\/XLR inputs and switch sources without repeated cable changes. Simultaneous RCA\/XLR outputs share the EQ-tuned signal, while the volume knob keeps final level control close at hand.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eCompact Aluminum HiFi Build: CNC-machined aluminum front panel, aluminum chassis and gold-plated I\/O connectors give EQ7 a sturdy, refined build with reliable signal contact. Its compact footprint fits easily into desktop, bookshelf or HiFi rack systems, while USB-C power keeps connection simple.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eQ: Is the XLR output true balanced?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. EQ7 uses a dedicated circuit to convert the processed audio signal into a true balanced XLR output (with opposite-phase signals), helping to minimize noise and maintain signal integrity.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eQ: Does the EQ7 support simultaneous RCA and XLR output?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. Whether the input is RCA (unbalanced) or XLR (balanced), the signal is processed by the EQ and then output through both RCA and XLR at the same time. The two outputs cannot be switched independently.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eQ: Does the EQ7 have a bypass function?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eA:\u003c\/strong\u003e There is no dedicated bypass switch. However, setting all EQ controls to the center position (0 dB) achieves a near-bypass effect, with no gain or attenuation applied.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eQ: What if the VU meter response is too strong or too weak?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Adjust the VU meter sensitivity and range controls on the rear panel. Fine-tune these settings while playing audio to achieve the desired display effect.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eQ: What power supply should be used?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eA: \u003c\/strong\u003ePlease use the included power adapter. If using another adapter, make sure it is a high-quality 5V DC power supply. Do not use fast-charging adapters, as they may affect performance or cause damage to the EQ7.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eParameters\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eModel: EQ7\u003c\/span\u003e \u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eAudio Input: RCA \/ XLR\u003c\/span\u003e \u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eAudio Output: RCA \/ XLR\u003c\/span\u003e \u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRCA-to-XLR True Balanced Conversion: Supported\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEQ Bands: 32Hz \/ 60Hz \/ 150Hz \/ 400Hz \/ 800Hz \/ 4kHz \/ 10kHz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eEQ Gain: ±10dB\u003c\/span\u003e \u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eFrequency Response: 20Hz-20kHz\u003c\/span\u003e \u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMax Input Level: 1.5Vrms\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMax Output Level: 8Vrms (at 600Ω load)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eInput Impedance:\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eRCA: 50kΩ\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eXLR: 10kΩ\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eOutput Impedance:\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eRCA: 10Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eXLR: 100Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMaximum Output Gain: 10dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eVU Meter Adjustment: Range \/ Brightness \/ Sensitivity  \u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePower Input: USB-C, DC 5V ≥1A\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W × D × H): 163 × 107 × 82 mm \/ 6.43 × 4.24 × 3.24 in \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage Dimensions (W × D × H): 210 × 185 × 100 mm \/ 8.27 × 7.28 × 3.94 in   \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet Weight: 760 g \/ 1.67 lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage Weight: 950 g \/ 2.09 lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003ePacking List\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1 × EQ7\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1 × DC 5V Power Adapter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1 × USB-C Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1 × User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":48661582446824,"sku":"XX-EQ7-US","price":119.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":48661582479592,"sku":"XX-EQ7-UK","price":119.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":48661582512360,"sku":"XX-EQ7-DE","price":119.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":48661582545128,"sku":"XX-EQ7-AU","price":119.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":48661582577896,"sku":"XX-EQ7","price":119.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/XX-EQ7_8.jpg?v=1781691298"},{"product_id":"douk-audio-lab-tx7-vu-meter-audio-spectrum-visualizer-desk-clock-display-decor","title":"Douk Audio Lab TX7 Desktop Display with VU Meter, Spectrum Visualizer \u0026 Clock","description":"\u003cdiv class=\"des\"\u003e\n\u003ch4 class=\"STYLE4\"\u003eFeatures\u003c\/h4\u003e\n\u003cp class=\"STYLE4\"\u003e \u003c\/p\u003e\n\u003cspan class=\"STYLE1\"\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli class=\"STYLE3\"\u003eBring Every Sound into View: Seven VU meter styles turn changing signal levels into smooth, responsive needle motion with a lifelike analog feel, while 2 audio spectrum visualizer modes reveal frequency movement in crisp detail and vivid color. Made for listeners who enjoy watching the signal as much as hearing the sound.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul class=\"STYLE3\"\u003e\n\u003cli\u003eTune Every Visual Response: Choose AUX line input for direct response or MIC pickup for convenience. Fine-tune VU motion with gain, damping, and stiffness, while spectrum mode adds 32\/64-band detail, response curves, real\/smooth response, colors, and peak\/fall timing to match your source and style.  \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul class=\"STYLE3\"\u003e\n\u003cli\u003eTurn Time Into Desk Ambiance: Give quiet moments their own look with 4 clock styles, 2 animated scenes, and 12 static standby screens. From focused work to late-night gaming or relaxed listening, TX7 stays useful as a desk clock and expressive as visual decor, keeping the setup fresh throughout the day. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul class=\"STYLE3\"\u003e\n\u003cli\u003eTouch Control Made Effortless: Swipe between display styles, tap into settings, and fine-tune key visuals with on-screen sliders. The responsive touchscreen keeps every change direct and intuitive, so you can refresh the mood, try a new look, or refine the display in seconds.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"STYLE3\"\u003eRefined Style for Modern Setups: Sandblasted anodized aluminum gives TX7 a refined look and solid feel. Vivid motion, retro VU charm, and changing visuals bring personality to any setup, making it a natural desk centerpiece and a memorable gift for music lovers, gamers, and desk setup fans. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e\u003chr\u003e\n\u003cbr\u003e\n\u003cp class=\"STYLE4\"\u003ePacking List\u003c\/p\u003e\n\u003cp class=\"STYLE3\"\u003e \u003c\/p\u003e\n\u003cdiv class=\"STYLE3\"\u003e\n\u003cul\u003e\n\u003cli\u003e1 × TX7\u003c\/li\u003e\n\u003cli\u003e1 × Leather Storage Case\u003c\/li\u003e\n\u003cli\u003e1 × 3.5 mm 1-to-2 Cable\u003c\/li\u003e\n\u003cli\u003e1 × USB-C Cable\u003c\/li\u003e\n\u003cli\u003e1 × 3.5 mm AUX Cable\u003c\/li\u003e\n\u003cli\u003e1 × User Manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch4\u003e\u003cbr\u003e\u003c\/h4\u003e\n\u003chr\u003e\n\u003ch4\u003e\u003cbr\u003e\u003c\/h4\u003e\n\u003cp class=\"STYLE4\"\u003eParameters\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"img-text-wrap\"\u003e\n\u003cdiv class=\"text-center\"\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Douk Audio Lab\u003c\/li\u003e\n\u003cli\u003eModel: TX7\u003c\/li\u003e\n\u003cli\u003eAudio Inputs: 3.5mm AUX Line In \/ MIC Pickup\u003c\/li\u003e\n\u003cli\u003eDisplay Resolution: 960 × 320 Pixels\u003c\/li\u003e\n\u003cli\u003eControl Method: Touchscreen\u003c\/li\u003e\n\u003cli\u003eMain Display Modes: VU \/ Audio Spectrum \/ Clock \/ Standby\u003c\/li\u003e\n\u003cli\u003eVU Mode: 7 Styles\u003c\/li\u003e\n\u003cli\u003eAudio Spectrum Mode: 2 Styles\u003c\/li\u003e\n\u003cli\u003eSpectrum Display: 32-Band \/ 64-Band\u003c\/li\u003e\n\u003cli\u003eClock Mode: 4 Styles\u003c\/li\u003e\n\u003cli\u003eClock Format: 12-Hour \/ 24-Hour\u003c\/li\u003e\n\u003cli\u003eStandby Mode: 14 Built-in Screens (2 Animated + 12 Static)\u003c\/li\u003e\n\u003cli\u003ePower Input: USB-C 5V \/ 1A\u003c\/li\u003e\n\u003cli\u003eDimensions (W × D × H): 124 × 23 × 54 mm \/ 4.89 × 0.91 × 2.13 in\u003c\/li\u003e\n\u003cli\u003ePackage Dimensions (W × D × H): 154 × 48 × 110 mm \/ 6.06 × 1.89 × 4.33 in\u003c\/li\u003e\n\u003cli\u003eNet Weight: 348 g \/ 0.77 lb\u003c\/li\u003e\n\u003cli\u003ePackage Weight: 581 g \/ 1.28 lb\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":48710518767848,"sku":"DZ116-US","price":99.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":48710518800616,"sku":"DZ116-UK","price":99.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":48710518833384,"sku":"DZ116-DE","price":99.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":48710518866152,"sku":"DZ116-AU","price":99.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":48710518898920,"sku":"DZ116","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/1_82f928d0-ec32-4ed3-9035-f11141c18467.jpg?v=1783414930"},{"product_id":"ampapa-h1-class-a-headphone-amplifier-with-4000mw-output-trs-rca-preamp","title":"[Pre-Sale] Ampapa H1 Class A Headphone Amplifier 4000mW with TRS\/RCA Preamp","description":"\u003ch4 class=\"STYLE2\"\u003eFeatures\u003c\/h4\u003e\n\u003cp class=\"STYLE2\"\u003e \u003c\/p\u003e\n\u003cul class=\"STYLE2\"\u003e\n\u003cli\u003ePower for Demanding Headphones: Built around a discrete Class A output stage, Ampapa H1 delivers strong current drive and up to 4000mW from its balanced high-gain output, giving 16–600Ω headphones wider headroom, steadier control and smoother dynamics. 4.4mm, 4-pin XLR and 6.35mm outputs fit more full-size HiFi headphone setups.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul class=\"STYLE2\"\u003e\n\u003cli\u003ePreamp Control for Your Audio System: With 2×RCA and 1×TRS analog I\/O, H1 keeps your DAC, CD player and streamer connected for simple source selection, while its preamp outputs can stay linked to multiple power amps or active speakers for system expansion. Designed to complement Ampapa Q1 and D1, it adds tube preamp control for a more unified stack.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul class=\"STYLE2\"\u003e\n\u003cli\u003eCustom ECC83 Tube Character: Made with exclusive PSVANE × Douk Audio ECC83 tubes, H1 brings a warmer, richer tube character to both headphone listening and preamp output. The custom tube set gives H1 a more distinctive out-of-box identity, while tube rolling support leaves room to fine-tune the sound later.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul class=\"STYLE2\"\u003e\n\u003cli\u003eEffortless Control Across Your Setup: Low, mid and high gain help H1 match sensitive headphones, everyday models and harder-to-drive pairs with less guesswork. HP, Line and HP+Line output modes cover headphone, preamp output or both, while the 1.5-inch OLED keeps key status clear and 12V Trigger helps compatible gear power on\/off together.  \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"STYLE2\"\u003eBuilt for Refined HiFi Use: Japan NJW1195 volume IC keeps channel balance stable, while pluggable op-amps leave room for sound tuning. 0.04% THD+N and ≥113dB SNR support clean signal performance, and the low-noise relays, isolated tube power shielding and CNC aluminum chassis add quieter operation and lasting build quality for demanding headphone listeners or serious HiFi users.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eParameters\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan class=\"STYLE14\"\u003e\u003cspan class=\"STYLE15\"\u003e\u003cspan class=\"STYLE16\"\u003e\u003cstrong data-end=\"104\" data-start=\"94\"\u003eBrand:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAmpapa\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"STYLE2\"\u003e\n\u003cstrong data-end=\"124\" data-start=\"114\"\u003eModel:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eH1\u003c\/li\u003e\n\u003cli class=\"STYLE2\"\u003e\n\u003cstrong data-end=\"148\" data-start=\"131\"\u003eAudio Inputs:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e2 × RCA Inputs \/ 1 × TRS Input\u003c\/li\u003e\n\u003cli class=\"STYLE2\"\u003e\n\u003cstrong data-end=\"201\" data-start=\"183\"\u003eAudio Outputs:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e2 × RCA Outputs \/ 1 × TRS Output\u003c\/li\u003e\n\u003cli\u003e4-Pin XLR \/ 6.35mm \/ 4.4mm Headphone Outputs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli class=\"STYLE2\"\u003e\n\u003cstrong data-end=\"295\" data-start=\"285\"\u003eTHD+N:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e0.04%\u003c\/li\u003e\n\u003cli class=\"STYLE2\"\u003e\n\u003cstrong data-end=\"313\" data-start=\"305\"\u003eSNR:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e≥113dB\u003c\/li\u003e\n\u003cli class=\"STYLE2\"\u003e\n\u003cstrong data-end=\"347\" data-start=\"324\"\u003eFrequency Response:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e20Hz–20kHz (±0.7dB)\u003c\/li\u003e\n\u003cli class=\"STYLE2\"\u003e\n\u003cstrong data-end=\"391\" data-start=\"369\"\u003eInput Sensitivity:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eRCA: 1V ; TRS: 2V\u003c\/li\u003e\n\u003cli class=\"STYLE2\"\u003e\n\u003cstrong\u003eRated Output Level (by Gain): \u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong data-end=\"456\" data-start=\"441\"\u003eRCA Output:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eHigh-3.0V ; Mid-2.1V ; Low-1.5V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong data-end=\"525\" data-start=\"510\"\u003eTRS Output:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eHigh-6.0V ; Mid-4.3V ; Low-3.0V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli class=\"STYLE2\" data-end=\"615\" data-start=\"584\" data-section-id=\"1f8qvx3\"\u003e\n\u003cstrong\u003eRated Headphone Output Power (by Gain):\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong data-end=\"637\" data-start=\"617\"\u003eBalanced Output:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eHigh-4W ; Mid-2W ; Low-1W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong data-end=\"709\" data-start=\"685\"\u003eSingle-Ended Output:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eHigh-1000mW ; Mid-500mW ; Low-250mW\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli class=\"STYLE2\"\u003e\n\u003cstrong data-end=\"799\" data-start=\"767\"\u003eMatched Headphone Impedance:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e16–600Ω\u003c\/li\u003e\n\u003cli class=\"STYLE2\"\u003e\n\u003cstrong data-end=\"854\" data-start=\"838\"\u003ePower Input:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eDC 12V \/ ≥2A, 5.5 × 2.1mm\u003c\/li\u003e\n\u003cli class=\"STYLE2\"\u003e\n\u003cstrong\u003eDimensions (W*D*H)\u003c\/strong\u003e: 155 × 124 × 42mm \/ 6.10 × 4.88 × 1.65in \u003c\/li\u003e\n\u003cli class=\"STYLE2\"\u003e\n\u003cstrong data-end=\"907\" data-start=\"884\"\u003ePackage Dimensions:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e268 × 192 × 95mm \/ 10.55 × 7.56 × 3.74in\u003c\/li\u003e\n\u003cli class=\"STYLE2\"\u003e\n\u003cstrong\u003eNet Weight:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e750g \/ 1.64lb\u003c\/li\u003e\n\u003cli class=\"STYLE2\"\u003e\n\u003cstrong data-end=\"971\" data-start=\"952\"\u003ePackage Weight:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e1.28kg \/ 2.82lb\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"STYLE3\"\u003ePacking List\u003c\/p\u003e\n\u003cdiv class=\"STYLE2\"\u003e\n\u003cul\u003e\n\u003cli\u003e1 × H1\u003c\/li\u003e\n\u003cli\u003e2 × ECC83 Tubes\u003c\/li\u003e\n\u003cli\u003e1 × DC 12V Power Adapter\u003c\/li\u003e\n\u003cli\u003e1 × 6.35mm to 3.5mm Adapter\u003c\/li\u003e\n\u003cli\u003e1 × 3.5mm Trigger Cable\u003c\/li\u003e\n\u003cli\u003e1 × Certificate\u003c\/li\u003e\n\u003cli\u003e1 × Warranty\u003c\/li\u003e\n\u003cli\u003e1 × Cleaning Cloth\u003c\/li\u003e\n\u003cli\u003e1 × User Manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eFAQs\u003c\/p\u003e\n\u003cdiv class=\"qa-container\"\u003e\n\u003cdiv class=\"qa-question\"\u003e\n\u003cdiv class=\"icon question-icon\"\u003eQ: Can I use multiple headphone outputs at the same time?\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"qa-answer\"\u003e\n\u003cdiv class=\"icon answer-icon\"\u003eA: \u003cspan class=\"STYLE15\"\u003eThe 6.35mm output has priority. When a 6.35mm plug or adapter is inserted, the 4.4mm and 4-pin XLR outputs are disabled. For best performance, we recommend using one headphone output at a time.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"qa-container\"\u003e\n\u003cdiv class=\"qa-question\"\u003e\n\u003cdiv class=\"icon question-icon\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"icon question-icon\"\u003eQ: \u003cspan class=\"STYLE15\"\u003eHow should I choose the gain setting?\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"qa-answer\"\u003e\n\u003cdiv class=\"icon answer-icon\"\u003eA: \u003cspan class=\"STYLE15\"\u003eUse Low Gain for sensitive or low-impedance headphones, Mid Gain for most daily listening, and High Gain for high-impedance or harder-to-drive headphones. Start low, then increase the gain if more volume or drive is needed.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"qa-container\"\u003e\n\u003cdiv class=\"qa-question\"\u003e\n\u003cdiv class=\"icon question-icon\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"icon question-icon\"\u003eQ: \u003cspan class=\"STYLE15\"\u003eCan I replace the tubes?\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"qa-answer\"\u003e\n\u003cdiv class=\"icon answer-icon\"\u003eA: \u003cspan class=\"STYLE15\"\u003eYes. H1 uses ECC83 tubes and supports compatible tube rolling with 12AX7, 7205, 6N4 and 5751 tubes. Always power off the H1 before replacing tubes, and confirm compatibility before trying other tube models.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"qa-container\"\u003e\n\u003cdiv class=\"qa-question\"\u003e\n\u003cdiv class=\"icon question-icon\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"icon question-icon\"\u003eQ: \u003cspan class=\"STYLE15\"\u003eCan I replace the op-amps?\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"qa-answer\"\u003e\n\u003cdiv class=\"icon answer-icon\"\u003eA: \u003cspan class=\"STYLE15\"\u003eYes. H1 uses two pluggable LME49720 op-amps and supports replacement with standard DIP-8 dual op-amps such as OPA2604, OPA2134 and MUSES02. Please power off the H1 before replacement and check chip orientation carefully.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"qa-container\"\u003e\n\u003cdiv class=\"qa-question\"\u003e\n\u003cdiv class=\"icon question-icon\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"icon question-icon\"\u003eQ: \u003cspan class=\"STYLE15\"\u003eWhat power adapter should I use?\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"qa-answer\"\u003e\n\u003cdiv class=\"icon answer-icon\"\u003eA: \u003cspan class=\"STYLE15\"\u003ePlease use the included DC 12V\/2A power adapter. If using another adapter, choose a high-quality DC 12V adapter rated at 2A or higher. Do not use an adapter with excessive voltage.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"STYLE3\"\u003e \u003c\/p\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":48735679742184,"sku":"SUC-H1-US","price":179.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":48735679774952,"sku":"SUC-H1-UK","price":179.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":48735679807720,"sku":"SUC-H1-DE","price":179.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":48735679840488,"sku":"SUC-H1-AU","price":179.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":48735679873256,"sku":"SUC-H1","price":179.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/1_bf5f9db8-3dcd-410d-b973-a16af285dd95.jpg?v=1783930279"},{"product_id":"pre-sale-douk-audio-vu2-pro-4-way-audio-selector-with-accurate-analog-vu-meter","title":"[Pre-Sale] Douk Audio VU2-PRO：4‑Way Audio Selector with Accurate Analog VU Meter","description":"\u003cdiv\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eFeatures\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eRetro VU Appeal Meets Precision Metering: VU2-PRO keeps VU2's classic dual-meter appeal and flexible RCA audio switching\/splitting, then steps up with calibrated level readings. See real analog levels, keep more gear connected, and spend less time rewiring when switching, comparing, or expanding your HiFi system.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eRead the Signal Behind the Swing: See accurate signal levels from front-end gear, making output differences and musical dynamics easier to understand without guessing by ear. Whether input levels are low or high, three meter-gain settings keep readings clear at a glance without changing the audio signal. Choose AVE for steadier average readings or PEAK to catch sudden signal peaks.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eLess Rewiring as Your System Grows: Keep more gear connected instead of swapping cables between setups. Connect up to four RCA sources like DACs or preamps and switch between them, or send one source to as many as four RCA outputs at once. Independent XLR pass-through adds VU metering to your balanced setup. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eBring Every Track to Life: Large analog VU meters make every rise and fall in music more vivid, easy to enjoy even from your listening seat. Choose from 35 backlight colors, color cycling, and 5 brightness levels to shape the look from a warm vintage glow to a cool modern vibe. For distraction-free listening, turn off the meters while switching stays active.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eBuilt to Belong in Your HiFi: CNC aluminum front panel and steel chassis bring the solid feel of true HiFi gear. USB-C DC 5V\/≥2A power keeps setup simple, while remote control and 5–15V Trigger IN\/OUT bring convenient switching and synchronized power control. A GND terminal adds grounding flexibility for managing hum or interference.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003cstrong\u003eQ: Which VU meter GAIN setting should I use?\u003cbr\u003eA: \u003c\/strong\u003eIf the input level is unknown, start at −20 dB. Maximum input: 24.5 Vrms at −20 dB, 7.75 Vrms at −10 dB, and 2.45 Vrms at 0 dB. Do not exceed the limit for the selected gain setting. GAIN only affects the VU meter range, not the audio level.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003cstrong\u003eQ: Can multiple RCA channels operate at the same time?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e In 1-IN-4-OUT mode, up to four RCA outputs can work at the same time. In 4-IN-1-OUT mode, multiple inputs can be selected, but using one at a time is recommended since there’s no separate volume control for each channel. Multiple outputs can only be selected simultaneously using the front-panel buttons.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003cstrong\u003eQ: Can RCA and XLR work at the same time?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. RCA and XLR operate independently and can be used simultaneously. XLR passes directly from IN to OUT, while the RCA\/XLR selector only changes which signal the VU meters display.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003cstrong\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt; color: #000000;\"\u003eQ: Why isn’t Trigger OUT activating my other device?\u003cbr\u003eA: \u003c\/span\u003e\u003c\/strong\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt; color: #000000;\"\u003eTrigger OUT only passes a control signal when Trigger IN receives a 5–15V trigger signal. It does not generate trigger voltage on its own.\u003c\/span\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003cstrong\u003eQ: Can I turn off the VU meters without affecting audio operation?\u003cbr\u003eA:\u003c\/strong\u003e Yes. Set the VU Meter GAIN selector to OFF; the meters and backlight will turn off, while RCA switching and XLR pass-through continue to work normally.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003cstrong\u003eQ: What type of power supply should I use?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Use a standard DC 5 V \/ ≥2 A USB power supply. Most fast-charging power supplies will work, but some may not be recognized correctly. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003cstrong\u003eQ: \u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt; color: #000000;\"\u003eAre batteries included with the remote control?\u003c\/span\u003e \u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e For safer and faster delivery, batteries are not included. The remote requires 2 × AAA batteries, which need to be prepared separately. \u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eParameters\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eBrand: Douk Audio\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eModel: VU2-PRO\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eAudio Inputs \/ Outputs: \u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eRCA: 1 common I\/O + 4 channel I\/Os\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eXLR: 1 input + 1 output\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eRCA Modes: 4-IN-1-OUT \/ 1-IN-4-OUT\u003c\/span\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eXLR Mode: 1-IN-1-OUT direct pass-through\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eFrequency Response: 20 Hz–20 kHz\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eSNR: ≥96 dB\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eInput Impedance: \u003c\/span\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eRCA: 47 kΩ ; \u003c\/span\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eXLR: 10 kΩ\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eVU Meter Gain: 0 \/ −10 \/ −20 dB\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eMeter Scale: −50 dB to +10 dB\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e0 dB Calibration Reference: 0.775 Vrms at 0 dB gain\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eMaximum Input Voltage by Meter Gain:\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e0 dB: 2.45 Vrms \/ −10 dB: 7.75 Vrms \/ −20 dB: 24.5 Vrms\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eIndication Accuracy: ±2 dB at the 0 dB reference point\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eMeter Response: AVE: 330 ms; PEAK: 100 μs \u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eBacklight: 35 colors + color cycling; 5 brightness levels\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eTrigger IN \/ OUT: DC 5–15 V, 3.5 mm TS\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003ePower-Loss Memory: Supported\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003ePower Input: USB-C, DC 5 V \/ ≥ 2A\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eVU Meter Size: 85 × 45 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eDimensions (W × D × H): 275 × 155 × 74 mm \/ 10.83 × 6.10 × 2.91 in\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003ePackage Dimensions (W × D × H): 380 × 220 × 100 mm \/ 14.96 × 8.66 × 3.94 in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eNet Weight: 1.46 kg \/ 3.22 lb\u003c\/span\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003ePackage Weight: 1.84 kg \/ 4.06 lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cstrong\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003ePacking List\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e1 × VU2 PRO\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e1 × Power Adapter \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e 1 × Remote Control (Batteries Not Included) \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e 1 × USB Cable \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e 1 × User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Douk Audio","offers":[{"title":"Black \/ US","offer_id":49017912918248,"sku":"XX-VU2-PRO-H-US","price":199.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ UK","offer_id":49017912951016,"sku":"XX-VU2-PRO-H-UK","price":199.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ EU","offer_id":49017912983784,"sku":"XX-VU2-PRO-H-DE","price":199.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ AU","offer_id":49017913016552,"sku":"XX-VU2-PRO-H-AU","price":199.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ China","offer_id":49017913049320,"sku":"XX-VU2-PRO-H","price":199.99,"currency_code":"USD","in_stock":true},{"title":"Silver \/ US","offer_id":49017913082088,"sku":"XX-VU2-PRO-S-US","price":199.99,"currency_code":"USD","in_stock":true},{"title":"Silver \/ UK","offer_id":49017913114856,"sku":"XX-VU2-PRO-S-UK","price":199.99,"currency_code":"USD","in_stock":true},{"title":"Silver \/ EU","offer_id":49017913147624,"sku":"XX-VU2-PRO-S-DE","price":199.99,"currency_code":"USD","in_stock":true},{"title":"Silver \/ AU","offer_id":49017913180392,"sku":"XX-VU2-PRO-S-AU","price":199.99,"currency_code":"USD","in_stock":true},{"title":"Silver \/ China","offer_id":49017913213160,"sku":"XX-VU2-PRO-S","price":199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/XX-VU2-PRO1.jpg?v=1788569528"},{"product_id":"pre-sale-douk-audio-vu3-plus-2-way-amplifier-speaker-selector-with-accurate-power-vu-meter","title":"[Pre-Sale] Douk Audio VU3-PLUS：2‑Way Amplifier\/Speaker Selector with Accurate Power VU Meter","description":"\u003cdiv\u003e\u003cstrong\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eFeatures\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eNext-Generation VU Metering: For listeners who love the sweep of large analog meters but want more practical value, VU3-PLUS answers that need. It carries forward VU3-PRO’s signature visual appeal, flexible amp\/speaker switching and effortless control, while adding precise power monitoring and higher power handling for demanding HiFi systems.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eSee What Your Amplifier Delivers: Shows actual amplifier output as clear, accurate watt readings for volume adjustment, speaker pairing and gear comparison. Select 2 \/ 4 \/ 6 \/ 8Ω based on speaker load for greater accuracy. 0 \/ +20dB gain covers a 0.01mW–1000W power measurement range without altering the sound. AVE shows steadier average output, while PEAK captures fast transient peaks.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eMore Flexible Listening Setups: As a selector\/splitter, it keeps two amplifiers and two pairs of passive speakers connected without repeated rewiring. Switch between amps and speaker pairs for quick system changes and A\/B comparisons, with the option to keep both speaker pairs active when needed. A built-in 510Ω protective load safeguards the unselected amp during switching. \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eMusic in Authentic VU Motion: Large analog VU meters follow actual output dynamics, giving every sweep a natural visual rhythm closely tied to the music. Tune the look from subtle glow to bold display with 35 backlight colors, color cycling and five brightness levels. For a more understated look, turn the VU meters off completely while amp\/speaker switching stays active.  \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eReady for Serious HiFi Systems: Compatible with all common amplifier types—Class A\/B\/D, BTL and tube amplifiers—VU3-PLUS handles up to 1000W pass-through at 8Ω. Remote control and 5–15V Trigger IN\/OUT streamline operation, while GND and USB-C 5V simplify setup. A CNC aluminum front panel and steel chassis give it the solid feel of a true HiFi component.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003cstrong\u003eQ: What is the maximum output power supported by the VU3-PLUS?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Maximum pass-through power depends on the total load impedance: 200W at 2Ω, 500W at 4Ω, 700W at 6Ω, and 1000W at 8Ω. Do not exceed the corresponding power limit.  \u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003cstrong\u003eQ: Can I use both speaker pairs at the same time, and which impedance setting should I choose?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. When both pairs are active, they are connected in parallel. Select the 2 \/ 4 \/ 6 \/ 8Ω setting closest to their combined impedance for accurate power readings, and make sure your amplifier supports the combined load. For example, 4Ω and 6Ω speakers combine to about 2.4Ω, so select 2Ω.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003cstrong\u003eQ: Can both amplifiers operate at the same time?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e No. Both can stay connected, but only one amplifier can be active at a time.  \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt; color: #000000;\"\u003e\u003cstrong\u003eQ: Will the 0 \/ +20dB gain affect volume or sound?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e No. It only changes how the VU meters display the signal and does not affect the sound.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt; color: #000000;\"\u003e\u003cstrong\u003eQ: Why isn’t Trigger OUT activating my other device?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Trigger OUT only passes a control signal when Trigger IN receives a 5–15V trigger signal. It does not generate trigger voltage on its own. \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt; color: #000000;\"\u003e\u003cstrong\u003eQ: Can I turn off the VU meters and use VU3-PLUS only as a switcher?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt; color: #000000;\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. The VU meters can be turned off completely while amplifier\/speaker switching and signal routing remain active. \u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt; color: #000000;\"\u003e\u003cstrong\u003eQ: What power supply should I use?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt; color: #000000;\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Use a standard USB-C 5V \/ ≥2A or higher power supply. Most USB adapters work normally, but some fast-charging supplies may not be recognized correctly.  \u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt; color: #000000;\"\u003e\u003cstrong\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eQ: Are batteries included with the remote control?\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eA: \u003c\/span\u003e\u003c\/strong\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eFor safer and faster delivery, batteries are not included. The remote requires 2 × AAA batteries, which need to be prepared separately.\u003c\/span\u003e \u003c\/span\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cstrong\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eParameters\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eModel: VU3-PLUS\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eAmplifier Inputs: 2 sets, banana binding posts\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eSpeaker Outputs: 2 sets, banana binding posts  \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eWorking Mode: 2-In-2-Out\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eFrequency Response: 20 Hz-20 kHz, ±3 dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eCompatible Amplifiers: All types of amplifiers \u003c\/span\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e(BTL\/ Class A\/ Class B \/ Class D digital amp \/ tube amp)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eMax. Pass-through Power: 200 W @ 2 Ω \/ 500 W @ 4 Ω \/ 700 W @ 6 Ω \/ 1000 W @ 8 Ω\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e Speaker Impedance Settings: 2 Ω \/ 4 Ω \/ 6 Ω \/ 8 Ω \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e VU Meter Gain: 0 dB \/ +20 dB \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e Power Measurement Range: 0 dB: 1 mW–1000 W; +20 dB: 0.01 mW–10 W \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e Indication Accuracy: ±2 dB at the 0 dB reference point \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e Meter Response: AVE: 330 ms; PEAK: 100 μs \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eBacklight: 35 colors + color cycling; 5 brightness levels  \u003c\/span\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e \u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e Amplifier No-Load Protection: Built-in 510 Ω protective load \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e Trigger IN \/ OUT: DC 5–15 V, 3.5 mm TS \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e Power Input: USB-C, DC 5 V \/ ≥ 2 A \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e VU Meter Size: 85 × 45 mm \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e Dimensions (W × D × H): 275 × 155 × 74 mm \/ 10.83 × 6.10 × 2.91 in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003ePackage Dimensions (W × D × H): 380 ×  220 × 100 mm \/ 14.96 × 8.66 × 3.94 in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eNet Weight: 1.78 kg \/ 3.92 lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003ePackage Weight: 2.17 kg \/ 4.78 lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003ePacking List\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e1 × VU3-PLUS\u003cspan\u003e\u003c\/span\u003e \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e 1 × Power Adapter \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e 1 × Remote Control (Batteries Not Included) \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e 1 × USB Cable \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e 1 × User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Douk Audio","offers":[{"title":"Black \/ US","offer_id":49019765915880,"sku":"XX-VU3-PLUS-H-US","price":229.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ UK","offer_id":49019765948648,"sku":"XX-VU3-PLUS-H-UK","price":229.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ EU","offer_id":49019765981416,"sku":"XX-VU3-PLUS-H-DE","price":229.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ AU","offer_id":49019766014184,"sku":"XX-VU3-PLUS-H-AU","price":229.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ China","offer_id":49019766046952,"sku":"XX-VU3-PLUS-H","price":229.99,"currency_code":"USD","in_stock":true},{"title":"Silver \/ US","offer_id":49019766079720,"sku":"XX-VU3-PLUS-S-US","price":229.99,"currency_code":"USD","in_stock":true},{"title":"Silver \/ UK","offer_id":49019766112488,"sku":"XX-VU3-PLUS-S-UK","price":229.99,"currency_code":"USD","in_stock":true},{"title":"Silver \/ EU","offer_id":49019766145256,"sku":"XX-VU3-PLUS-S-DE","price":229.99,"currency_code":"USD","in_stock":true},{"title":"Silver \/ AU","offer_id":49019766178024,"sku":"XX-VU3-PLUS-S-AU","price":229.99,"currency_code":"USD","in_stock":true},{"title":"Silver \/ China","offer_id":49019766210792,"sku":"XX-VU3-PLUS-S","price":229.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/1_f67f373c-2148-42d2-9aa6-302cc52e68c8.jpg?v=1788579548"},{"product_id":"pre-sale-douk-audio-s4-dual-4-inch-2-way-passive-bookshelf-speakers","title":"[Pre-Sale] Douk Audio S4 Dual 4-Inch 2-Way Passive Bookshelf Speakers","description":"\u003ch4 class=\"STYLE2\"\u003eFeatures\u003c\/h4\u003e\n\u003cp class=\"STYLE2\"\u003e \u003c\/p\u003e\n\u003cp class=\"STYLE2\"\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"STYLE2\"\u003eDual 4-Inch Sound with Real Body: Built for listeners who want richer, more grounded sound from a passive bookshelf speaker, each S4 uses dual 4-inch mid-bass drivers to handle lower mids and bass with more ease. Vocals gain warmer presence, drums hit with cleaner impact, and audio feels fuller and more complete without loose boom.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"STYLE2\"\u003e \u003c\/p\u003e\n\u003cul class=\"STYLE2\"\u003e\n\u003cli\u003eThree Drivers for Layered Texture: A coated 25mm silk dome tweeter with a neodymium motor keeps highs smooth and clear. Nomex composite mid-bass drivers, long-excursion design, and shorting rings support steadier cone control and lower distortion. The result is richer texture and cleaner separation, making complex music easier to follow.  \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"STYLE2\"\u003e \u003c\/p\u003e\n\u003cul class=\"STYLE2\"\u003e\n\u003cli\u003eAcoustic Tuning for Balanced Playback: A 3kHz crossover with selected MKP capacitors and air-core inductors refines the handoff between the silk tweeter and dual mid-bass drivers. The tuned bass-reflex cabinet reinforces low-end body through controlled airflow, giving S4 a more cohesive, well-balanced playback character.  \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"STYLE2\"\u003e \u003c\/p\u003e\n\u003cul class=\"STYLE2\"\u003e\n\u003cli\u003eBi-Wire and Bi-Amp Ready: With 4Ω impedance and 50W AES \/ 100W Max power handling, S4 is designed as a natural match for most Douk Audio, Nobsound, and Ampapa amplifier setups. Bi-wire and bi-amp ready terminals let advanced HiFi systems separate high and low frequency paths for cleaner signal flow, stronger drive control, and future upgrades. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"STYLE2\"\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"STYLE2\"\u003ePiano Gloss with Modern Elegance: Made to be seen, the white piano-gloss cabinet softens the equipment-heavy look of traditional speakers. On speaker stands, shelves, desktop setups, or audio racks, it becomes a polished focal point. Rounded edges, no veneer edges to lift, protective grilles, and anti-slip foot pads keep the pair clean, stable, and display-ready.  \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"STYLE2\"\u003e \u003c\/p\u003e\n\u003cp class=\"STYLE2\"\u003e \u003c\/p\u003e\n\u003chr\u003e\n\u003cp class=\"STYLE3\"\u003ePacking List\u003c\/p\u003e\n\u003cdiv class=\"STYLE2\"\u003e\n\u003cblockquote\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003cul\u003e\n\u003cli\u003e1 Pair × S4\u003c\/li\u003e\n\u003cli\u003e2 × Speaker Grilles\u003c\/li\u003e\n\u003cli\u003e4 × Anti-Slip Foot Pads\u003c\/li\u003e\n\u003cli\u003e1 × User Manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":49021552001256,"sku":"SUC-S4-US","price":399.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":49021552034024,"sku":"SUC-S4-UK","price":399.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":49021552066792,"sku":"SUC-S4-DE","price":399.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":49021552099560,"sku":"SUC-S4-AU","price":399.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":49021552132328,"sku":"SUC-S4","price":399.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/000_fb0caf4f-9b23-498f-a98c-f9c7ccc9befc.jpg?v=1788589602"},{"product_id":"pre-sale-douk-audio-vol-4-stereo-volume-controller-with-remote","title":"[Pre-Sale] Douk Audio VOL-4 Stereo Volume Controller with Remote","description":"\u003cdiv\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eFeatures\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eUpgrade Your HiFi Volume Control: Keep the HiFi system you already enjoy while adding convenient remote volume control. VOL-4 is ideal for fixed-output DACs and streamers, or systems where volume controls are missing or hard to reach—without replacing the rest of your setup.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 18.6667px;\"\u003eMore From One Remote: Control volume, tone, power and mute directly from your listening position. Dedicated buttons keep everyday adjustments within easy reach, while one-touch mute handles calls or conversations without changing your preferred volume setting.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 18.6667px;\"\u003eSee Every Setting as You Tune: Set volume from 0–99 with clear OLED feedback for every adjustment, making familiar settings easy to revisit. Bass and treble each offer ±9 dB of tuning range, giving you room to shape tonal balance around different music, speakers and listening preferences.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 18.6667px;\"\u003eKeep Your HiFi Signal Clean: VOL-4 adds easier volume control without making signal quality an afterthought. SNR ≥115 dB and THD+N 0.001% maintain very low noise and distortion, while closely matched L\/R output adds confidence in consistent stereo performance. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 18.6667px;\"\u003eBuilt to Fit Your System: Connect VOL-4 between common RCA line-level sources and power amps or active speakers, while Bypass sends the RCA signal directly through when powered but switched off. The GND terminal gives short turntable ground leads a closer grounding point, and 5V USB-C keeps setup and placement flexible.  \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eQ: Why is there still sound after VOL-4 is turned off, and why is it louder?\u003cbr\u003eA: \u003c\/span\u003e\u003c\/strong\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 18.6667px;\"\u003eThis is normal. When powered but switched off, VOL-4 passes the RCA signal through at full volume, bypassing volume and tone controls. Lower source or downstream volume before switching on\/off.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003cstrong\u003eQ: What is the GND terminal used for?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e If your turntable ground lead is too short, VOL-4 can act as an intermediate grounding point between the turntable and your amplifier or phono preamp, giving you more flexibility in equipment placement. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003cstrong\u003eQ: Why doesn’t the remote control include batteries?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The remote requires 2 × AAA batteries, which are not included. Please prepare them separately before use. \u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eParameters\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eBrand: Douk Audio\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eModel: VOL-4\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eAudio Input: Stereo RCA\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eAudio Output: Stereo RCA\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eTHD+N: 0.001%\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eSNR: ≥115 dB\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eFrequency Response: 20 Hz–20 kHz (±0.1 dB)\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eInput Sensitivity: 2 V\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eInput Impedance: 47 kΩ\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eOutput Impedance: 10 kΩ\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eMaximum Output Level: 2 V\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eVolume Range: 0–99\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eBass\/Treble Adjustment: ±9 dB\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003ePower Input: USB-C, DC 5V \/ ＞1A\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eDimensions (W × D × H): 95 × 70 × 30 mm \/ 3.74 × 2.76 × 1.18 in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003eNet Weight: 204 g \/ 0.45 lb\u003c\/span\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003ePackage Weight: 420 g \/ 0.93 lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003ePacking List\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e1 × VOL-4\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e1 × Remote Control (Without Batteries)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e1 × DC 5V Power Adapter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e1 × USB Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt; font-family: 'times new roman', times;\"\u003e1 × User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":49044639056104,"sku":"SUC-VOL-4-US","price":69.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":49044639088872,"sku":"SUC-VOL-4-UK","price":69.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":49044639121640,"sku":"SUC-VOL-4-DE","price":69.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":49044639154408,"sku":"SUC-VOL-4-AU","price":69.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":49044639187176,"sku":"SUC-VOL-4","price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/0_87f601e3-c75b-411c-bdf3-b4a77ceb4e42.jpg?v=1789093548"},{"product_id":"douk-audio-u2-pro-fc-xmos-xu316-usb-ddc-reclocker-femtosecond-version","title":"[Pre-Sale] Douk Audio U2-PRO-FC XMOS XU316 USB DDC Reclocker-Femtosecond Version","description":"\u003ch4 class=\"STYLE3 STYLE34 STYLE15\"\u003eFeature\u003c\/h4\u003e\n\u003cp class=\"STYLE2\"\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"STYLE2\"\u003eUpgrade Your USB Digital Link: Convert USB audio from computers, phones and streamers to optical, coaxial and I2S simultaneous outputs, bringing modern sources to DACs, AV receivers and soundbars without USB input. Femtosecond clocking and dedicated USB-C power raise the performance ceiling for more lifelike playback.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"STYLE15\"\u003e \u003c\/p\u003e\n\u003cul class=\"STYLE15\"\u003e\n\u003cli class=\"STYLE34\"\u003eUnlock More with Femto Clocking: Crystek CCHD-957 femtosecond clocking lowers phase noise and jitter beyond standard clocking, bringing firmer imaging, cleaner separation and finer ambience cues. Dedicated USB-C power supports premium or linear supplies, matching precision clocking with an equally serious power foundation.  \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"STYLE15\"\u003e \u003c\/p\u003e\n\u003cul class=\"STYLE15\"\u003e\n\u003cli class=\"STYLE34\"\u003eUnleash Hi-Res with XMOS XU316: Asynchronous USB processing handles PCM up to 32-bit\/768kHz and DSD512, delivering high-rate audio for capable DACs with greater clarity and stability. I2S carries the highest rates beyond standard S\/PDIF bandwidth, keeping your digital front end from becoming the bottleneck.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"STYLE15\"\u003e \u003c\/p\u003e\n\u003cul class=\"STYLE15\"\u003e\n\u003cli class=\"STYLE34\"\u003eTwo UAC Modes for More Sources: Choose UAC 1.0 for driver-free USB audio from PS4, PS5 and Switch, or UAC 2.0 for high-rate PCM and DSD from PCs, phones, tablets and streamers. One digital interface adapts to both console compatibility and serious HiFi playback.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"STYLE15\"\u003e \u003c\/p\u003e\n\u003cul class=\"STYLE15\"\u003e\n\u003cli class=\"STYLE34\"\u003eBuilt for Easier HiFi Integration: Check I2S compatibility quickly with the printed bottom-panel pinout, while five LEDs show PCM\/DSD format and sample rate at a glance. The compact aluminum chassis fits neatly beside your DAC or amp, and the included 2-in-1 USB-A\/USB-C cable makes more sources easy to connect.  \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003chr\u003e\n\u003cp class=\"STYLE3\"\u003eSystem Driver Requirements\u003c\/p\u003e\n\u003cp class=\"STYLE3\"\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan class=\"STYLE2\"\u003eFor Windows 10 and Above: Driver-free for PCM up to 384kHz; Requires driver for higher sampling rate and DSD \u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"STYLE2\"\u003eFor MacOS: Driver-free\u003c\/li\u003e\n\u003cli class=\"STYLE2\"\u003eFor Win 7\/8: Requires driver for PCM\/DSD\u003c\/li\u003e\n\u003cli class=\"STYLE2\"\u003eFor Android: Driver-free\u003c\/li\u003e\n\u003cli class=\"STYLE2\"\u003eFor iOS: Driver-free\u003c\/li\u003e\n\u003cli class=\"STYLE2\"\u003eFor Linux: Driver-free\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"STYLE2\"\u003eFor PS4\/PS5\/Switch: Driver-free \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003chr\u003e\n\u003cp class=\"STYLE15 STYLE2\"\u003e\u003cstrong\u003ePacking List\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"STYLE15 STYLE2\"\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"STYLE2\"\u003e1 × U2-PRO-FC\u003c\/li\u003e\n\u003cli class=\"STYLE2\"\u003e1 × Optical Cable\u003c\/li\u003e\n\u003cli class=\"STYLE2\"\u003e1 × USB-A\/C to USB-C Cable\u003c\/li\u003e\n\u003cli class=\"STYLE2\"\u003e1 × User Manual\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":49064709587176,"sku":"SUC-U2-PRO-FC-US","price":249.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":49064709619944,"sku":"SUC-U2-PRO-FC-UK","price":249.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":49064709652712,"sku":"SUC-U2-PRO-FC-DE","price":249.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":49064709685480,"sku":"SUC-U2-PRO-FC-AU","price":249.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":49064709718248,"sku":"SUC-U2-PRO-FC","price":249.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/0_b2a415e9-1e8f-47cb-91c3-513577d0a7d2.jpg?v=1789453845"}],"url":"https:\/\/doukaudio.com\/zh\/collections\/new-releases-1.oembed?page=2","provider":"Douk Audio","version":"1.0","type":"link"}