Douk Audio U2 PRO

I have a respectable, audiophile grade stereo system based in large part on the mighty LAIV Harmony DAC. I became aware of digital reclockers via various YouTube videos. To be frank, I wasn't expecting much of reclockers in general and the Douk in particular given its price. I was wrong. The Douk made an instantly noticeable improvement to sound quality in several ways once I connected it between my audio PC and the Harmony. I used USB from my PC to the Douk, and IS2 from the Douk to the Harmony DAC. The most notable improvement was in increased transparency and detail (the Harmony is no slouch in these areas on its own). I also heard deeper, fuller, tighter bass combined with a fuller, more detailed treble. I highly recommend this reclocker or the similar SMSL PO-100 device for high performance audio systems using digital sources if you're on a budget.

Basically, the understanding of our hearing is not really well understood, certainly not in the context of sound reproduction. Our ears are INCREDIBLY sensitive to timing and distortion (of any kind not just amplifier THD). With that said, keeping tight control of the timing and noise floor for the signal is key right up until the actual conversion. This little device here? While it only goes up to DSD256, it most certainly cleans up the signal and allows my DAC to really shine. Using the I2s output, things went from fantastic to HOLY SH1T. The mix becomes clearer and more defined, bass suddenly appears from the depths (of your speaker's capabilities, my in-room response is 18-20khz), imaging and soundstage coherence and spaciousness is increased. Now this is with and without HQPlayer in the mix. So, in general there is great improvement to be had especially IF YOUR DAC HAS A POOR USB IMPLEMENTATION. I tried this with my Topping DX7 Pro with class A op-amps (can't remember the damn name of the manufacturer) and my PS Audio Gaincell DAC. I can't say I notice any loud pops or clicks during rate changes. By the way, powering this thing with a battery pack makes things sound even better. Simply more of what I described above. Also of note, I run my amps, pre, and dac through a PS Audo P3 Power Regenerator, which absolutely makes a difference. If the system and environment is quiet, some of the more subtle improvements can be heard very distinctly (use of this thing in the first place, using a battery to power it). Bonus, go try out HQPlayer if you haven't already and see what properly filtered audio sounds like. If you have an existing PC with recent-ish tech (RTX accelerator a plus), you can improve the sound of your music collection immensely by running it through HQPlayer. You'll get more out of that with this device between your streamer and DAC. (then of course, go fix your room accoustics)... :)

I keep almost buying a dedicated streamer like the Cambridge CXN but then wonder if I can get similar results cheaper and more modular so when they come out with a new CX whatever next year with a much finer DAC I won’t be pouting about it. Anyway so far so good at first I tried their small DSD which worked ok but seemed kind of flaky and would just stop playing after hours and would need reset (unplugged and back in) still sounded good. Upgraded to this unit with a good USB C to USB B cable and an amazing wireworld coax audio to my NAD DAC / amp it sounds great and no issues with it just stopping at all. Source is M2 MacBook Pro running Qobuz and Tidal. I would definitely recommend it and although I do believe in cable and component burn in I can’t honestly be sure if this box itself has gotten better or the upgrade to the wireworld Coax but it really does sound incrementally better all the time.

Excellent value for money! Not gonna lie a lot of the reviwes of this device are about something completely different to what I bought this device for. So I will tell you about this device little trick. Long story short, it allows you to use your soundbar (in my case my Sonos Beam gen 2) as your pc speaker. Not only that you can even play music from your phone. Yes, I know you can use airplay to play music from your speaker. But sometimes the wifi is just not reliable. Also using a soundbar as a pc speaker creates a really clean setup. Honestly great little device. 5/5 stars

1. Got it to use my usb printer style cable to convert usb to i2s input into my dac 2. As soon as i plugged it in my dac my dac read dsd stream. 3. I started messing with the functions of the dac and lost the dsd recognition ?? (I should have messed with the dsd settings - niw i created new problem for myself) 4. I played regular SACD disc without the pDouk DDC & i2s to compare with and 1without the DDC i2s converter. 5. There is a major sound difference immediatly in my low budget system. With Douk DDC and i2s t DAC using wiim ultra -- music sounded better than my SACD disc. Sound sounds alot more better quality

Works OK as long as you only need PCM. You cannot install the provided driver for DSD in Windows 11 due to an old driver from iBasso. It does not install because of a conflict with digital signature. Certificate in the digital signature expired in 2016 and the software is over 7 years old. Company did not prove an updated driver when request but instead sent me a link to the SAME garbage that was in the package then they promptly ignored any more emails.

I use this device as a USB to Coax translation from a Linux server, connected to a McIntosh C2500 DAC. Often, at the start of a song, my McIntosh spit out white noise. It never did this before with other device. I tried the Optical out and got the same random bug. To me this unit is defective or a piece of junk. I have to hunt for another USB to Coax translation device.

Hasta ahora a cumplido con mis expectativas muy fácil de usar, tardo un poco en llegar pero nada fuera de lo normal, lo recomiendo

思った以上に音質が悪いと感じたので、他の製品にした。

Very nice product and affordable. However, if somebody is looking for best quality, he should use the SPDI coaxial digital cable and not fiber optic, a mistake many people do. I am using Coaxial good quality cable and I am very happy with it.

Good unit but do not like the USB input on the front. Should have been at the back. Front connection provides no options for cable management.

Funciona muy bien, se siente de buena calidad pero no le doy 5 estrellas porque el primero que pedí llegó en una bolsa sin caja ni manuales ni accesorios además de no funcionar, estaba defectuoso. Supongo que era uno que había sido devuelto anteriormente. Lo devolví y lo volví a pedir. El segundo llegó en su caja con accesorios y todo bien, ha funcionado sin problemas. Por eso no le doy 5 estrellas.