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๐Ÿ”Š powerful mini bluetooth 5.0 tube headphone amplifier usb dac - enhancing audio quality with stereo audio preamp aptx-ll logo

๐Ÿ”Š Powerful Mini Bluetooth 5.0 Tube Headphone Amplifier USB DAC - Enhancing Audio Quality with Stereo Audio Preamp APTX-LL Review

7

ยท

Very good

Revainrating 4 out of 5ย ย 
Ratingย 
4.1
๐Ÿฟ Home Theater, ๐ŸŽต Home Audio

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Description of ๐Ÿ”Š Powerful Mini Bluetooth 5.0 Tube Headphone Amplifier USB DAC - Enhancing Audio Quality with Stereo Audio Preamp APTX-LL

Douk Audio U4 is a multi-function HiFi audio device, with Bluetooth 5.0 and USB input, stereo RCA, 3.5mm AUX, 3.5mm headphone jack output, which can be used as a Bluetooth receiver, a USB DAC, a headphone amp and a stereo preamp, compatible with phone, computer, power amplifier, active speakers and so on. Adopting classic 6N3 vacuum tube(much better than 6J*) to effectively eliminate the harsh digital sound, providing HiFi clear, soft and smooth, warm and sweet tube sound. The sound field is wide, especially suitable for vocals, strings, light music, classical music, etc. Bluetooth 5.0 (QCC3008 chip) supports APT-X, APTX-LL, adding classic TDA1543 chip for decoding and external high-gain detachable antenna, makes its sound transmission low-delay and lossless. USB sound card part uses CM6642 chip, supports 24bit 192KHz transmission, compatible with Windows / Mac / Linux system and Android mobile phone with OTG function, no need for driver, plug and play. Headphone amp uses classic MAX9722 decoding chip, 300mW output power can drive most 16-600 ohm headphones. Super mini size and exquisite appearance, with power and select switch, working indicators and volume control. Using all-aluminum chassis CNC machined and laser carving, looks fashionable and powerful, perfectly suitable for your desktop or a smaller space in your home or office.

Reviews

Global ratings 7
  • 5
    3
  • 4
    2
  • 3
    2
  • 2
    0
  • 1
    0

Type of review

Revainrating 5 out of 5

Just what I needed for amp

Works great. Included with the device was a Soviet OTK 6n3p-ev NOS lamp (that's good). This is a great way to add Bluetooth connectivity to any system.

Pros
  • Absolutely amazing!
Cons
  • Not bad, but...

Revainrating 3 out of 5

Not turned on, power cord too short

Everything was ready for installation, when I unplugged the power cord it didn't reach my outlets. The cable is only 34 inches (thumbs down).

Pros
  • Sturdy construction
Cons
  • No machine

Revainrating 3 out of 5

Volume control does not work on preamp only on headphone

Bluetooth works fine xs but when used as a headphone amp there is a strange hiss. And the volume doesn't work when you use it as a preamp. Get something different.

Pros
  • Useful not only for its intended purpose
Cons
  • There are cons

Revainrating 5 out of 5

Really cool - amp

Great for adding that tube warmth and extra power to push my pair of gear. The only thing I would suggest is a clamp to hold the tube in place, it's amazing how easy it is to pull it out of its socket.

Pros
  • Finally bought it
Cons
  • Some cons

Revainrating 4 out of 5

Not bad at all for the price. . .

I was pleasantly surprised by this unit. I just bought it to see how it sounds and for $60 it's not bad at all. I occasionally listen to headphones through it, but mostly I use it to connect Bluetooth to my bookshelf speakers. Works great for this purpose.

Pros
  • Great price
Cons
  • Big and chunky

Revainrating 4 out of 5

Great sound and good build.

Everything about this device is very good except for one thing. The volume knob only controls the headphone jack, not the RCA jacks. I keep it but it was a disappointment. For the price it is fabulous and meets all expectations. I REALLY wanted to control my output to my amp with a volume knob instead of digging around in my computer to adjust the volume. Although the volume control works well with the headphone jack. I wish it had this highly desirable feature. Headphone output to my powerโ€ฆ

Pros
  • Easy to use
Cons
  • Quick start guide

Revainrating 5 out of 5

Great desktop preamp

Update: I still love this amp. I've had it since January and it hasn't let me down yet. That doesn't mean I didn't have problems with it. YOU NEED TO BUY NEW CABLES FOR THIS THING! I had problems with unplugging the USB cable, replaced it with a good quality USB cable and fixed it. The DAC was failing and I had to turn it off, close everything that was using sound on my PC, and then turn it back on every time I turned off the desk lamp :/ Replacing the PSU completely fixed this as well. Withโ€ฆ

Pros
  • Done
Cons
  • Some issues