{"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","url":"https:\/\/doukaudio.com\/zh-ca\/products\/douk-audio-d2-15w-hifi-linear-power-supply-with-dc-usb-5v-output","provider":"Douk Audio","version":"1.0","type":"link"}