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

Product ID: 243975841

Details

Brand
Douk Audio
Compatible Devices
Amplifier DAC
Connectivity Technology
HDMI TOSLINK
Frequency Response
192 KHz
Number of Channels
2

⚡Dual power input: USB & external 5V DC

🎧Supports PCM up to 384kHz & DSD256

🔌XMOS XU208 chip, 1000MIPS power

SAR 24

Duties & taxes included

In stock

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Description

🎶 Unlock your DAC’s true potential with precision digital clarity!

HIGH RES AUDIO SUPPORT - Native PCM up to 384kHz and DSD256 DOP decoding for next-level sonic detail.
PORTABLE POWER FLEXIBILITY - Powered via USB or external 5V DC input—perfect for desktop setups or on-the-go HiFi listening.
PREMIUM BUILD COMPONENTS - Crafted with gold-plated connectors, OS-CON capacitors, and aluminum alloy casing for durability and signal integrity.
VERSATILE MULTI OUTPUT INTERFACE - Simultaneously outputs via TOSLINK optical, coaxial, and HDMI IIS for seamless DAC/preamp integration.
AUDIOPHILE GRADE DIGITAL RECLOCKING - Experience crystal-clear sound with ultra-low jitter and noise floor control.

The Douk Audio U2 PRO is a compact, high-performance USB to digital audio interface featuring the advanced XMOS XU208 chip with 1000MIPS processing power. It supports simultaneous coaxial, optical, and HDMI IIS outputs, delivering pristine PCM up to 384kHz and DSD256 audio formats. Built with premium components and flexible power options, it elevates any DAC, preamp, or amplifier setup by reducing jitter and enhancing soundstage detail—making it a must-have for discerning audiophiles and professionals seeking superior digital audio fidelity.

Specifications

ASIN	B08HN3VSF8
Audio Input	USB
Best Sellers Rank	#508,747 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #641 in Signal Converters
Brand	Douk Audio
Brand Name	Douk Audio
Compatible Devices	Amplifier, DAC, Headphone, Personal Computer, Preamp, Speaker
Connectivity Technology	HDMI, TOSLINK, USB
Customer Reviews	4.1 out of 5 stars 134 Reviews
Frequency Response	192 KHz
Item Dimensions D x W x H	3.5"D x 2.9"W x 0.83"H
Manufacturer	Douk Audio
Manufacturer Part Number	DZ081
Maximum Sample Rate	384 KHz
Model Number	DZ081
Number of Channels	2
Product Dimensions	3.5"D x 2.9"W x 0.83"H
Unit Count	1 Count

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