​Douk Audio U2 USB to SPDIF Converter: Digital Interface - Optical/Coaxial Hi-Res Audio Adapter for PC/Phones & DAC Systems (XMOS XU316 Chip)​​

Warm tips 1. The U2 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 only supports 2.0 channel stereo audio. Multichannel formats such as 5.1, 7.1, or Dolby formats are not supported. 3. 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 * Audio input: USB Type-C * Audio output: Coaxial / Optical * USB chip: XMOS XU316 * Max. sampling rate supported: PCM: 44.1kHz-192kHz / 16Bit-24Bit DSD: DOP DSD64 * Operation systems PC-USB supported: W10 / W11 / Mac OS / Android / iOS Win7 / Win8 / Linux (Cannot guarantee 100% compatible) * THD+N: 0.000008% * Working voltage: DC 5V * Dimensions (W*D*H): 40*52*20mm / 1.57*2.05*0.79in * Package dimensions (W*D*H): 170*120*50mm / 6.69*4.72*1.97in * Net weight: 45g / 0.1lb * Package weight: 170g / 0.37lb System Driver Requirements * For Windows 10 and Above: Driver-free for PCM; Requires driver for DSD * For MacOS: Driver-free * For Win 7/8: Requires driver for PCM/DSD * For Android: Driver-free * For iOS: Driver-free * For Linux: Driver-free Packing list * U2 Digital Interface ×1 * Optical Cable ×1 * USB-C to USB-A/USB-C Cable ×1 * User Manual ×1

• Lossless USB to S/PDIF Conversion: Instantly convert audio from your PC, laptop, phone or tablet into simultaneous optical and coaxial S/PDIF outputs with zero signal loss and no added latency. Ideal for feeding high-quality digital audio to DACs, amplifiers, and home theater receivers that lack USB inputs.
• Hi-Res XMOS XU316 Chipset: Enjoy true high-fidelity sound with support for PCM up to 24-bit/192kHz and DSD64 (DoP). The advanced XMOS XU316 DDC chipset provides ultra-low jitter and a cleaner digital signal, capturing every detail in your music—perfect for audiophiles and high-end Hi-Fi systems.
• Plug-and-Play Convenience: No drivers are required on modern operating systems. Simply connect the included dual-head USB cable (USB-C and USB-A) and enjoy instant audio output. Fully OTG-ready, the U2 works seamlessly with phones and tablets for effortless use on the go.
• Real-Time Format Indicator: Built-in LED indicators clearly display whether the audio is PCM or DSD and show the current sampling rate. This real-time feedback lets you confirm your audio format at a glance, ensuring bit-perfect playback and giving you peace of mind that you’re hearing exactly what was intended.
• Compact, Hi-Fi Friendly Design: Pocket-sized at only 1.6×2.0 inches and 45g, the U2 slips easily into any setup without adding clutter. Its lightweight, space-saving build is ideal for crowded desks or small shelves, making it perfect for desktop Hi-Fi rigs and portable listening stations without sacrificing performance.