Product Description

Features

Unlock Pristine Lossless Audio: Easily convert the USB signal from your PC, Mac, phone or Raspberry Pi etc. into clean and simultaneous outputs of Optical, Coaxial and I2S. Feed a clear, stable, and jitter-free digital signal to those classic DACs, amplifiers and AV receivers without USB input for an immediate sound quality upgrade.

Ultra-high Resolution with XMOS XU316: Equipped with the latest XMOS XU316 chip, the U2 PRO ensures virtually no latency, stable signal transmission, and exceptional sound clarity. Supports PCM up to 32bit/768kHz and DSD512, perfect for high-end music streaming and professional audio playback.

Strong Compatibility via UAC Mode Switch: Specially designed with a UAC mode switch, the 1.0 mode offers plug-and-play, driver-free compatibility for gaming consoles like PS4, PS5 and Switch, while 2.0 mode enables high-resolution audio support for advanced playback needs.

Expandable Oscillator Design: With ample internal space to accommodate compatible crystal oscillators, the U2 PRO lets audiophiles and DIYers freely upgrade their preferred high-precision clock to further reduce jitter and achieve an even higher level of sonic performance and system synergy.

Compact Size with Convenient Indicators: Pocket-sized and USB-powered, the U2 PRO includes a USB-C to USB-A/C cable for broad device compatibility—truly plug and play. Real-time PCM/DSD indicators make it easy to monitor sample rates and formats. A simple yet powerful upgrade for audiophiles, gamers alike.

Warm tips

1.The U2 PRO supports OTG and comes with an OTG-compatible USB cable for direct connection to OTG-enabled phones. For iPhones or iPads with a Lightning port, a high-current camera kit is required. Newer models with a Type-C port can use the included cable directly.

2. The U2 PRO supports oscillator replacement (not pluggable, needs soldering). To replace the U2 PRO's oscillator, it needs to meet these specs:
24.000MHz/1.8-3.3V (active oscillator)
Can be SMD or through-hole (DIP)
SMD size: 5032
DIP spec: DIP14
The smaller the frequency tolerance (+ppm), the better.
*We also tested fixed 3.3V oscillator, it can work normally as well. However, we can't guarantee that every voltage within the 3.3–5V range will work. Rest assured, an incompatible oscillator will not damage the U2 PRO, it may simply not function.

3. The U2 PRO only supports 2.0 channel stereo audio. Multichannel formats such as 5.1, 7.1, or Dolby formats are not supported.

4. Please install the required driver and files from the included USB drive, and follow the instructions or video guide to set up your player properly.

Parameters

Brand: Douk Audio
Model: U2 PRO
Audio input: USB Type-C
Audio output: Coaxial/Optical/HDMI-IIS
USB chip: XMOS XU316
Output mode switch: UAC 1.0/UAC 2.0
Max. sampling rate Coaxial/Optical supported:

PCM：44.1kHz-192kHz/16Bit-24Bit

DSD：DOP DSD64

Max. sampling rate IIS supported:

PCM：44.1kHz-768kHz/16Bit-32Bit

DSD (Native): 64-512

DSD (DOP): 64-256

Operation systems PC-USB supported: W10/W11/Mac OS/Android/iOS/PS5/Switch
Jitter: 75ps (typical)
THD+N: 0.000008%
Working voltage: DC 5V
Dimensions (W*D*H): 85*79*26mm / 3.35*3.11*1.02in
Package dimensions (W*D*H): 195*155*70mm / 7.68*6.10*2.64in
Net weight: 220g / 0.44lb
Package weight: 400g / 0.88lb

Packing list

1* U2 PRO Digital Interface
1* Optical Cable
1* USB-C to USB-A/USB-C Cable
1* User Manual

Douk Audio U2 PRO XMOS XU316 Interface digital USB DDC Mini S/PDIF Conversor DSD512 para telefone/PS5 (versão de atualização)

Specifications

Product Description