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3.5mm headphone jack output is prior, which means stereo RCA and XLR output will auto disconnect when headphone is inserted.
Parameters
Chips: QCC5125 (Bluetooth chip) + CS4344 (DAC chip)
Tubes: 2*JAN5725W
Audio Input: Bluetooth / Balanced XLR / Stereo RCA
Audio Output: Balanced XLR/Stereo RCA / 3.5mm headphone jack
Bluetooth version: 5.0 (support LDAC 96khz/24Bit)
RCA maximum output amplitude: 2V
BAL maximum output amplitude: 4V
Headphone output power: 120mW (32Ω)
Headphone impedance range: 16-300Ω
Distortion: 0.05%
SNR: ≥103dB
Working voltage: DC 12V
Input Sensitivity: 1Vrms
Frequency response: 20Hz-20KHz (±1dB)
Dimensions (W*D*H): 126*167*42mm / 4.96*6.57*1.65in
Package dimensions (W*D*H): 310*240*70mm / 12.20*9.45*2.76in
Net weight: 665g / 1.47lb
Package weight: 1.0kg / 2.20lb
Packing list
1*H8 Preamp
2*JAN5725W Tube
1*DC 12V Power Adapter
1*Bluetooth Antenna
1*Remote Control
Customer
Reviewed in the United States on April 29, 2025
Introduces faint electrical noise into the system even when powered off - not ideal for nearfield setups.With the preamp removed the amp and speakers do not have any of the noise using the same sources/interconnects.Either inadequately shielded pcb or power supply?
Vincent Cutrer
Reviewed in the United States on September 29, 2024
Music sounds great through this. Have a geshelli J2 DAC going to this preamp and this gives just a touch of needed warmth to the sound.The only complaint I have with this preamp is the remote. The remote doesn't work all the time, even at a close range. Not sure if I got a faulty remote or not, but I would still recommend this preamp because it sounds great.
Le Roi
Reviewed in the United States on October 26, 2024
The preamp sounds fine. Good, in fact. The remote is convenient. The rca connect requires finding the perfect match. I would not use this as a headphone amp. It is ingenuous and thoughtfully designed and very adequate in sound quality for the price.
Sparky
Reviewed in the United States on September 26, 2023
Using preamplifier with gjallarhorn amplifiers, musicians pegasus thru sony dvd player klipsch rf3ii speakers, the sound is as good as my freya+ worth every penny.
Erik
Reviewed in the United States on August 6, 2023
Yes! The perfect solution to amplify my pathetically weak BenQ projector's audio signal enough to adequately drive my powered monitors/speakers and provide a platform to play music through my iPhone via Bluetooth through said monitors eliminating the mish-mash of audio devices I had going on in my living room. I haven't used the XLR inputs and might never but the RCA and Bluetooth channels work perfectly on this little unit. The remote is straight-forward easy to use. The only thing I don’t like about it is even when it’s off Bluetooth devices connect to it. I’m sitting here wondering why there’s no sound on my iPhone and it’s because it’s connected to the preamp but the preamp is off. Fix that and you get five stars.
James C Lundin
Reviewed in the United States on May 5, 2023
I have pretty good audio gear, but it was lacking a little in the warmth department. Enter the Douk H8, a well-designed, solidly built unit. It did nothing but hand over a very good signal coming from my Pontus DAC to a very good Class A amp in the Schiit Aegir, adding a bit of tube warmth along the way.I don't like bright. Some audiophiles call it extended highs. The bit of warmth the H8 added while not disturbing anything else was all I needed, and got. I also wanted XLR connectors to make sure no noise seeped into the audio path and the H8 provided them.I couldn't be happier and can recommend this preamp without hesitation.
Dante Kanki
Reviewed in the United States on October 6, 2023
I was a bit skeptical purchasing the Douk H8, but I've decided giving it a try. What a surprise!!! I needed a preamp with XLR connections and I was using the Topping Pre-90 preamp, which is an excellent product, super neutral, quiet, good imaging.I'm using it connected to Denafrips Pontus II DAC and to Starkrimson Ultra amp.Douk H8 came with the tubes JAN5725W. Sound is okay, warm, but after switching with JAN5654W, I got a good sound improvement in terms of precision particularly on high frequencies.The remote controller looks cheap, but it is functional with volume control, tone, equalization and loudness controls. I can point it to any direction in my room, and it works fine, which is not true with the remote controller that comes with Topping Pre-90.In that price range, there is nothing that can beat the H8. Warm and detailed sound, quiet and neutral. So far I've not found anything bad on it.Chinese audio related equipment companies have improved a lot lately!!There is only one thing that bothered me when I opened the box. I could hear something loose inside the preamp. It was a small screw that probably the assembler dropped inside.Product is working perfectly!Thanks to Douk for the excellent product.
keith
Reviewed in the United States on October 16, 2023
This is a great product at a great price. It’s solid. I’m a professional musician and know good sound. This piece allows me to stream music to it, warm up the sound with tubes, use tone control and volume via remote, and output balanced xlr to my Crown power amp and Martin Logan electro stats. It’s sonic bliss at a crazy low price. Using the 5654 tubes. Highly recommend.
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