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

4.0 out of 5 stars 117 ratings
To see product details, add this item to your cart. You can always remove it later.

Purchase options and add-ons

Brand Douk Audio
Maximum supply voltage 5.25 Volts
Minimum supply voltage 5 Volts (DC)
Mounting type Coaxial,Plug Mount
Number of pins 4
Interface type USB, HDMI, Coaxial
Number of channels 2
Product Dimensions 8.9L x 7.4W Centimetres
Material Copper
Manufacturer Douk Audio

About this item

  • With USB (type-B) 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.
› See more product details

Product details

  • Product Dimensions ‏ : ‎ 8.89 x 7.39 x 0.1 cm; 249 g
  • Date First Available ‏ : ‎ Sept. 30 2020
  • Manufacturer ‏ : ‎ Douk Audio
  • Place of Business ‏ : ‎ ShenZhen, GuangDong 518110,CN
  • ASIN ‏ : ‎ B08HN3VSF8
  • Item model number ‏ : ‎ DZ081
  • Customer Reviews:
    4.0 out of 5 stars 117 ratings

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Douk Audio U2 PRO XMOS XU208 Digital Interface, USB to TOSLINK Coaxial/Optical/HDMI IIS Audio Adapter, for DAC/Preamp/Amplifi
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Product Description

Douk Audio U2 PRO

XMOS XU208 Digital Interface

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 Input

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

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)

Douk Audio U2 PRO

Packing List
Packing List
  • 1*U2 PRO Converter
  • 1*USB Cable
  • 1*USB to DC Cable
  • 1*Driver CD

Douk Audio U2 PRO

Parameters

  • Audio input: USB (type-B)
  • Audio output: Toslink Optical / Coaxial / HDMI IIS
  • USB chip: XMOS XU208
  • Supported PCM: 44.1KHz, 48KHz, 88.2KHz, 96KHz, 176.4KHz, 192KHz, 384KHz
  • Supported 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

Panel Introduction

Panel Introduction
Douk Audio U2 PRO
Douk Audio U2
Douk Audio Q3
Nobsound Q5
Douk Audio A10
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Customer Reviews
4.0 out of 5 stars 117
3.8 out of 5 stars 274
3.8 out of 5 stars 21
3.6 out of 5 stars 4
—
Feature Digital interface; USB to Toslink optical/coaxial/I2S converter; XMOS XU208 Digital interface; USB to Toslink optical and coaxial converter; XMOS XU208 DAC; Headphone Amp; USB/Coax/Opt DAC; Headphone Amp; USB/Coax/Opt Bluetooth power amplifier; USB/Opt/Coax; 240W
Input USB (type-B) micro USB PC-USB/Optical/Coaxial PC-USB/Optical/Coaxial Bluetooth 5.0/RCA/USB/Optical/Coaxial
Output Toslink Optical / Coaxial / HDMI IIS Toslink Optical / Coaxial RCA / 6.35mm headphone output RCA / 6.35mm & 3.5mm headphone jack Passive speakers / Active SUB
PCM 44.1KHz, 48KHz, 88.2KHz, 96KHz, 176.4KHz, 192KHz, 384KHz 44.1KHz,48KHz,88.2KHz,96KHz,176.4KHz,192KHz,16-24Bit - no data - no data - no data
DSD 2.8MHz(DSD64)-DOP, native / 5.6 MHz (DSD128) -DOP, native / 11.2 MHz (DSD256) , native 2.8MHz(DSD64)-DOP - no data - no data - no data
Sampling Rate no data no data 96K/24Bit (PC-USB) 192K/24Bit (OPT/COAX) 24bit/192KHz (USB/Coaxial/optical) 192K/24Bit (USB/Coaxial/optical)
Douk Audio P1
Douk Audio X1
Nobsound NS-01G PRO
Douk Audio SE
Nobsound MS-10D MKIII
Nobsound DB32
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Customer Reviews
4.2 out of 5 stars 968
4.1 out of 5 stars 430
—
3.7 out of 5 stars 918
4.0 out of 5 stars 157
3.7 out of 5 stars 31
Feature Bluetooth preamp; Headphone amp; Vacuum tube; Tone control; APTX-HD Bluetooth vacuum tube MM phono power amplifier Bluetooth stereo amplifier; USB sound card; 100W 2-CH Bluetooth amplifier; TF&U-Disk; 100W Bluetooth hybrid vacuum tube power amplifier; USB/OPT/COAX 32-Bit MIC sound level; Audio spectrum

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Customer reviews

4 out of 5 stars
117 global ratings

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Top reviews from Canada

  • Silverfox8
    5.0 out of 5 stars Does what it says and does it well!
    Reviewed in Canada on January 26, 2025
    Verified Purchase
    I'm using it from a WiiM Ultra USB out to an external DAC via coax. The theory is that it reduces jitter and improves the sound. I do think that the sound is improved. As far as doing what it says converting USB to Coax or optical it works great. I did try the I2S out and it worked but not consistentantly.
    One person found this helpful
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  • Denis Lachance
    5.0 out of 5 stars Plug and play ready on windows 10
    Reviewed in Canada on March 3, 2023
    Verified Purchase
    Item as described, fast shipping, plug and play on Windows 10, no sound test so far for comparaison but sounds very good with my computer
    Helpful
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  • Robert Clark
    2.0 out of 5 stars Worked for a bit
    Reviewed in Canada on September 24, 2022
    Verified Purchase
    I was very much impressed with this little box until it started sending out of sync data. It was like the PCM clock had jitter or was double clocking. The bottom line is that the product is not reliable. I would have contacted DOUK Audio directly, but they do not have a valid support link.
    One person found this helpful
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Top reviews from other countries

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  • ?scar Hernndez
    4.0 out of 5 stars Cumple con lo prometido y de muy buena calidad
    Reviewed in Mexico on June 10, 2022
    Verified Purchase
    Hasta ahora a cumplido con mis expectativas muy fcil de usar, tardo un poco en llegar pero nada fuera de lo normal, lo recomiendo
    Report
  • muri
    1.0 out of 5 stars һ
    Reviewed in Japan on April 3, 2025
    Verified Purchase
    ˼äϤʤȸФΤǡuƷˤ
    Report
  • Sung.Yee
    5.0 out of 5 stars Simple and cheap converter to use your standalone audio components i2s input without pin switching
    Reviewed in the United States on May 15, 2025
    Verified Purchase
    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
    Report
  • ᨦٴǰ
    3.0 out of 5 stars El primero que compr estaba defectuoso, ste funciona bien.
    Reviewed in Mexico on May 26, 2023
    Verified Purchase
    Funciona muy bien, se siente de buena calidad pero no le doy 5 estrellas porque el primero que ped lleg en una bolsa sin caja ni manuales ni accesorios adems de no funcionar, estaba defectuoso. Supongo que era uno que haba sido devuelto anteriormente. Lo devolv y lo volv a pedir. El segundo lleg en su caja con accesorios y todo bien, ha funcionado sin problemas. Por eso no le doy 5 estrellas.
    Report
  • Bernd W. Herrmann
    5.0 out of 5 stars This USB to Digital interface is invaluable for a number of reasons...
    Reviewed in the United States on October 30, 2022
    Verified Purchase
    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 鶹. 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.
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