{"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","url":"https:\/\/doukaudio.com\/es\/products\/douk-audio-h5-hifi-tube-mm-phono-preamp-w-sub-out","provider":"Douk Audio","version":"1.0","type":"link"}