Douk Audio HiFi Bluetooth 5.0 6J5 Valve Tube Bass Preamp

(68 customer reviews)


Douk Audio HiFi Bluetooth 5.0 6J5 Valve Tube Bass Preamplifier

SKU: 33042733307 Category:
Can’t decide if you want a tube amp? See our blog post for more info: Are Tube Amps Better?


  • With 3 kinds of audio input(Bluetooth/USB/RCA) and 2 kinds of output(RCA/3.5mm headphone), P1 can be used as HiFi tube Preamp, USB DAC or headphone amp with HiFi clear, warm, dynamic, sweet tube sound, bringing extremely high-quality listening experience.
  • Bluetooth 5.0 (QCC3008) supporting APT-X, APT-X LL lossless transmission. PC-USB (CM6642) supporting 24bit 192KHz and compatible with Windows/Mac/Linux system, matching well with many audio devices such as iPod, Phone, MP3 players, TV, Blu-ray players, Echo Dot, CD players, etc.
  • Adopting 2PCS NE5532 classic 47 headphone amp architecture which can drive 32-300 ohm headphones, and a bypass switch is specially designed to turn on/off the tone control, more convenient to enjoy original sound or obtain more delicate sound with treble and bass control knob, adding much fun and higher playability.
  • Exquisite appearance with proper size, blue and orange light decorating vacuum tube, makes it fashionable and attractive, bringing wonderful auditory and visual enjoyment, very suitable for home and desktop audio system.

Chip Architecture: CM6642+QCC3008+NE5532+classic 47
PC-USB Input Sampling Frequency 192K/24Bit THD 0.01%
PC-USB System supported XP/W7/W8/W10/MAC/Linux Bluetooth VER 5.0
Headphone matching impedance 32-300Ω SNR 103dB
Headphone Max power output 160mW 32Ω load Working voltage DC12V
Bass & Treble Range ±6dB Product Dimension 180*118*36mm
RCA output level 2.3V Product Weight 0.47kg
Frequency Range 20Hz-20kHz(±3dB) Package Dimension 240*210*60mm

Packing List
  • 1*P1 Preamp
  • 2*6J5 Tube
  • 1*Power Supply
  • 1*USB Cable
  • 1*Bluetooth Antenna
  • 1*Manual




Brand Name




Maximum Power Per Channel


Model Number





2 (2.0)


Tube Pre-Amplifier

Audio Inputs

Stereo L/R RCA, USB, Bluetooth

Audio Outputs

Analog Audio, Headphone Jack, Preamp, Stereo L/R RCA

68 reviews for Douk Audio HiFi Bluetooth 5.0 6J5 Valve Tube Bass Preamp

  1. H***m

    Products are OK. Shipping quickly grew.

  2. L***u

    There is a bit of hiss comparing to my audio card.(The max volume hiss test). Tested with Meze 99Classics. Overall it is nice to be able to control the tone for the headphones, at the expense of the lost neutrality. Good product if you need an amplifier or you are curious about lamps in general. No connectivity issues, and nice sturdy build.

  3. D***n

    I pc-fi is being used. Tidy and high quality performance is no. So more neat sound source to enter the sound card the water you use. PC-soundcard (DAC)-nobsound preamp – headphone reason. This amplifier vacuum tube highlight push force is apparently giving strong. But small and delicate sound squish to Jim lot high input the sound is clearly not broken don’t other DAC grab bars body.

  4. A***e

    To buy with your eyes closed, heat for A better sound, than happiness, good store.

  5. Y***g

    Very fast summer well write LL

  6. M***o

    This is the one of the best purchases i made and im really impressed. The bluetooth connection was very easy and fast. Sound quality is unbelievablea and great value for the money.

  7. A***v

    The lamps are heated heavily, if completely embraced with three fingers for longer than 2 seconds-Burns. The body is metallic, heated noticeably but does not burn. Sound quality compared to the smashed soundhoods just the sky and the Earth! Details appeared. Who used to be far on the second plan. The driver did not swing did not put Windows 7 recognized itself without problems. Tested in ATH-M50x headphones. Packed well, in foam or something. Happy. Recommend!

  8. Y***h

    Item delivered and as described. Took 1 month though.

  9. S***s

    Buy previously one less quality and the difference is impressive. Sounds great for the cost you have. Perfect

  10. O***o

    It’s just super!!!!!

  11. P***i

    Fast shipping, amplifier fully operational and positively surprises sound quality. Recommend this store.

  12. M***s

    Product match the description and well finished. Good sound.

  13. Customer

    Description perfect, as in the picture. Product tested, sounds great great as low, excellent treble, ingenerare great expand highly recommended. Perfect shop recommended.

  14. D***e

    Computer battery sound card with three try to make you satisfied

  15. U***r

    very good product thanks a lot bogdan krupa new jersey USA

  16. A***n

    This unity finally solved a long period of finding the correct solution with a proper impedance match with my active speakers. The audio quality surpasses all alternatives I have tried in the past. The unit does produce audible white noise. When audio is paused or at quiet moments it switches itself off with an audible mechanicals click. One of the tube looks misty/used but has no impact on the audio.

  17. A***a

    Preamplifier arrived from China to Poland in niespełna month. Excellent workmanship-fully spełnił my expectations. Amazing value for money. Firmly recommend and thank you stores for reliable service transaction.

  18. J***i

    Good. Execellent

  19. M***r

    Clean sound satisfactory.

  20. Customer

    Excellent product, very well built and accurate, exceptional sound quality, safe packaging and complete, exactly as described, very satisfied, delivery fast store, recommend to all customers from Ali Express!

  21. M***i

    Confirmed its Bluetooth connection with Galaxy smart phone.

  22. R***u

    Nice service, fast shipping, work great!

  23. O***v

    Доставка до Владимира 3 дня, предусилитель отлично играет в связке с Techniсs su-v500 и s90, звук становится сочнее процентов на 50. еще есть fx502s pro но с ним пока не пробовал. отпишу позже по ощущениям.

  24. L***x


  25. J***k

    Excelentní Velmi dobrý OK.

  26. G***r


  27. B***o

    Value for money if you need a dac or preamp to fire up your active speakers. decent build and quality for daily use. I use it to connect to my Andriod Smart TV via Bluetooth and works well.

  28. Customer

    Great store. Satisfied.

  29. Customer

    Awesome quality sound from the bluetooth into a Yamaha amp.Very crisp sound.

  30. Customer

    very good. ok

  31. P***a

    Suberb! This little thing is awesome, maybe the best bought that I ever done on last years. Everything worked well, usb, bluetooth, headphone, the knobs of volume, treble and bass. Very well constructed. I’m so happy with this.

  32. S***s

    Доставили до двери за один день

  33. K***y

    OK, thant you! Fast delivery!

  34. Customer

    Due to Covid19, shipment a little bit delayed. Finally arrived, tested ok. However, just notice, 6J5 tube being used is 7pin version. I have octal socket version 6J5 NOS, can not be used with this pre-amp. Perhaps anyone has further info?

  35. P***e

    Het is een Soul audio geen Nobsound. Is hetzelfde maar beschrijving klopt dus niet, werkt overigens super!

  36. A***r

    Nice build quality, good sound. It comes with USB cable.

  37. G***p

    한국에서 발주 하고 7일 정도 소요 된듯 가격대비 좋구요 220v 플러그 보내주셨구요 막 귀 이신분 그냥 믿고 쓰지면 됩니다 한국에서는 3-40만원 이상은 줘야됩니다 진공관 앰프니까 믿고 구매하세요 강추 할께요