Where can I purchase the 5V 2A power supply for this unit, and which one would owners recommend?

If you require a compact/portable power supply for the USB interface, you can use a 5V rechargeable power bank such as this connected via the USB power cable included with the USB interface: https://www.amazon.com/gp/product/B07YBTYX9D/ref=ox_sc_act_title_1?smid=A2XWJAAZM0RYQD&psc=1

What is the I2s pinout configuration on this?

Hello. Please refer to our last product image. It shows clearly.

does it support multichannel pcm/asio/dsd?

Hello. It can accept multi-channel input but can only output 2-channel.

Does the douk u2 audio pro output 384k on spdif if the usb input is 384k? the douk site is vague, but does seem to say that spdif out limit is 192k

Hello. Only the I2S output supports all sampling rate while S/PDIF supports 192KHz and DOP DSD64 at highest

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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

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

Product ID: 743369997

Details

Audio input
USB
Brand
Douk Audio
Connectivity technology
HDMI TOSLINK
Number of channels
2
Product dimensions
8.9D x 7.4W x

🎧Supports PCM up to 384kHz & DSD256

💡Simultaneous USB to TOSLINK/Coax/HDMI output

🔌XMOS XU208 chip, 1000MIPS power

Description

🎶 Elevate your sound game with pro-grade digital precision!

HI RES AUDIO MASTERY - Supports PCM up to 384kHz and native DSD256 for audiophile-grade clarity and depth.
SLEEK SMART DESIGN - Compact black aluminum alloy chassis with PCM/DSD indicators adds a modern, professional touch to your desktop audio rig.
VERSATILE MULTI OUTPUT - Simultaneously outputs via TOSLINK optical, coaxial, and HDMI IIS to seamlessly integrate with any high-end setup.
POWER ANYWHERE ANYTIME - Dual USB and external 5V DC input lets you power the device from phone chargers or power banks—perfect for on-the-go audiophiles.
NEXT LEVEL AUDIO PROCESSING - XMOS XU208 chip with 1000MIPS RAM delivers ultra-stable, high-fidelity sound beyond typical USB DACs.

The Douk Audio U2 PRO is a compact, high-performance USB to digital audio interface featuring the powerful XMOS XU208 chip with 1000MIPS RAM. It supports ultra-high-resolution PCM up to 384kHz and native DSD256 playback, outputting simultaneously through TOSLINK optical, coaxial, and HDMI IIS interfaces. Designed for seamless integration with DACs, preamps, and amplifiers, it offers versatile power options including USB and external 5V DC input. Its premium components and sleek aluminum alloy case ensure reliable, noise-free signal transmission and a stylish addition to any professional audio setup.

Specifications

ASIN	B08HN3VSF8
Audio Input	USB
Brand Name	Douk Audio
Connectivity Technology	HDMI, TOSLINK, USB
Customer Reviews	4.2 4.2 out of 5 stars (126)
Item Dimensions D x W x H	8.9D x 7.4W x 2.1H centimeters
Manufacturer	Douk Audio
Manufacturer Part Number	DZ081
Maximum Sample Rate	384 KHz
Model Number	DZ081
Number of Channels	2

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