Douk Audio U2 PRO XMOS XU208 Digital Interface, USB to TOSLINK Coaxial/Optical/HDMI IIS Audio Adapter, for DAC/Preamp/Amplifier, Support PCM & DSD256

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.

Prior to purchasing this model, I was not aware that such an accessory even existed. I was having problems with noise and other factors with the USB input running from my desktop PC to my FX-Audio DAC X6 DAC unit. I had almost given up on it when I came across this Douk Audio U2 Pro advertisement on Amazon. It features a much higher conversion rate than my FX-Audio DAC. My FX Audio DAC had a top conversion rate of 24 Bit-192 kHz, whereas this Douk Audio U2 Pro USB to Digital interface has a top conversion rate of 32 Bit-384 kHz. After ordering it, I connected it by plugging it into my USB input on my PC, and then running a Digital Coax cable from the U2 Pro to my FX Audio DAC. The result - I was absolutely delighted in the sound transformation. Any noise was completely removed - absolute silence now - but more so, the sound reproduction qualities improved substantially. The improvements were substantial enough that it was discernible immediately with a warmer, less digital tonality, yet the music was very dynamic. So for folks who might be having USB issues on their PC, placing an item such as this U2 in the sound path between your PC/Lap-Top (connected via USB) and a DAC or amp (running either an optical or digital coax cable from the U2), you might be in heaven. Douk also makes a less expensive version known as just the U2. That particular model has a conversion rate of 24 Bit-192 kHz. Either way, both of the Douk models are inexpensive, yet they really punch far above their weight, considering what they do. SMSL also makes a smaller one with a 24 Bit-192 kHz conversion rate. Again, I was not prepared for the wonderful audio qualities I began experiencing once I inserted this device in my path between a PC and my DAC. There are so many different ways that you could connect this device - although you must remember that the device must plug into a USB input on whatever you are using as a source, and then you have a choice of running either an optical cord or a digital coax cord to whatever input device you select (DAC, Preamp, Receiver, Amp, etc.). I'm surprised that not more companies make devices such as this (at a reasonable price, that is). I don't know what else I can add here. These wonderful devices (2 of them made by Douk) may (can) solve many an issue involving with USB inputs on various devices. And for the small amount of money you expend, the results far overshadow the small amount of cash you may have expended. As is always the case, personal reviews are subjective. Your mileage may obviously vary. For me, this U2 Pro (and I also purchased the lesser expensive U2) made a huge improvement.