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User Manual of Douk Audio U2 PRO
Warm tips：
- I2S output supports all sampling rate while S/PDIF supports 192KHz and DOP DSD64 at highest.
- Please read the picture of HDMI interface definition of U2 pro to make sure it is compatible with your decoder before placing order.
- When use external power adapter, please use the USB of computer, power bank or 5V power adapter with voltage stabilization, don't use phone charger which may result in damaged because of transient overvoltage
- Please set the volume of operation system to maximum(100) if you want to listen to DSD music.
- Please note that U2 pro only supports 2.0 channel stereo audio.
- With USB input and TOSLINK optical / coaxial /HDMI 12S output(can output at the same time), can work well with DAC, preamp, amplifier or speaker. Adopting XMOS XU208 chip solution, with 1000MIPS random access memory much higher than U8 (500MIPS), and more stable than Italian Amanero solution and coaxial output supports DSD DOP.
- Output interface with DSD ON function can match the decoder that needs DSD ON signal to decode DSD songs, supporting 44.1K-384KHz/16-32 Bit sampling rate and DOP DSD256 at highest, better signal process brings higher sound quality.
- High-quality components are used to ensure better performance, such as ultra-low noise LDO regulated power supply, LVDS differential chip, gold-plated coaxial interface, OS-CON solid capacitors and Panasonic FC filtering and decoupling capacitors, the contact internal resistance is smaller and the data transmission is more reliable.
- USB interface can be used as signal input and power input at the same time, and with external DC 5V input (with priority) that can be powered by phone charger or power bank, easy to enjoy HiFi music any time and any where.
- Mini size with exquisite design, with PCM and DSD indicator easy to show the output format, black aluminum alloy cases look more cool and fashionable, very suitable for desktop audio device to use.
- Audio input: USB (type-B)
- Audio output: Toslink Optical / Coaxial / HDMI IIS
- USB chip: XMOS XU208
- Supported sampling rate:
PCM: 44.1KHz, 48KHz, 88.2KHz, 96KHz, 176.4KHz, 192KHz, 384KHz (384K is only for IIS output)
DSD: 2.8MHz(DSD64)-DOP, native / 5.6 MHz (DSD128) -DOP, native / 11.2 MHz (DSD256) , native - Bit width(highest): 32 bit (I2S output) / 24 bit (S/PDIF), compatible with 16bit
- Working current: 130mA
- Dimensions(W*D*H): 74*89*21mm / 2.91*3.50*0.83in
- Net weight:112g/ 0.25lb
- Package weight: 280g / 0.62lb
- 32/64 bit Win 7, Win 8 and Win 10 systems need to install driver, please enter website: LINK to download and install.
- Native ac OS 10.6 and above, can use the system's own driver. And Native Linux with UAC2 compliant kernel also can use the system's own driver.(Has tested on Ubuntu and Daphile systems, based on INTEL X86)
- In general, USB input default supports Android 5.0 system while Android 4.2 and above need phones with OTG function. Recommend to use Hiby player to play DSD music. OTG cable (for Android system) or camera kit (for IOS system) need to prepare by youself.
- U2 PRO Converter ×1
- USB Cable ×1
- USB to DC Cable ×1
- Driver CD ×1
XMOS XU208
- XMOS XU208 chip solution can offer higher random access memory and better stability
- Compatible with 32/64 bit Win 7~10 systems (needs driver), Mac OS 10.6 and Native Linux with UAC2 (no driver needed), Android with OTG function
USB interface
- Support PCM & DSD
- Can work well with DAC, preamp, amplifier or speaker
- USB port can also be used to power this device
OPT/ COAX / HDMI Outputs
- TOSLINK optical / coaxial /HDMI 12S can output at the same time
- Output interface with DSD ON function (DOP DSD256 at highest)
Compaq; but have a powerful DAC.
Thanks
1. Got it to use my usb printer style cable to convert usb to i2s input into my dac2. 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
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.
This is a good interface box for connecting usb to multiple outputs, coax, optical and 12S. I use it to contact my phone to my dac for hi-res playback via itunes.
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.
