Douk Audio U2 PRO: a USB digital interface that takes audio from a computer over USB-C and hands it to your DAC through coaxial, optical or HDMI I2S outputs. Weighing 220 g, it suits hi-fi hobbyists whose DAC lacks a USB input and system builders who keep USB conversion separate from the DAC.
Who the Douk Audio U2 PRO is for
DACs without a USB input: It converts a computer's USB audio to coaxial, optical or HDMI I2S, letting a DAC that lacks USB play from your computer.
System builders: It moves the USB conversion step out of the DAC and into a dedicated box with its own digital output stage.
DACs with an HDMI I2S input: Beyond coaxial and optical, it offers an HDMI I2S output for DACs built to accept that connection.
Computer-based listening: One USB-C link carries the audio from your computer, and a USB-C to USB-A/USB-C cable plus an optical cable come in the box.
Skip it if: you don't already own a DAC; every output on the U2 PRO is digital (coaxial, optical, HDMI I2S), so it can't feed an amp, speakers or headphones by itself.
Douk Audio U2 PRO key specs
Type: USB digital interface (computer-to-DAC bridge)
Input: USB-C
Outputs: Coaxial, optical, HDMI I2S
Weight: 220 g
In the box: U2 PRO digital interface, optical cable, USB-C to USB-A/USB-C cable, user manual
Brand-new, genuine Douk Audio stock. Free US shipping and 45-day returns from TonePier. Order from TonePier and get free US shipping plus 45 days to confirm the U2 PRO works in your chain.
Douk Audio U2 PRO vs similar options
vs SMSL PO100 PRO: Same USB-C-to-digital job, outputting I2S (LVDS), optical and coaxial from an XMOS XU316, with 32-bit/768kHz PCM over I2S, native DSD and MQA specified; pick it if you need those formats documented.
vs SMSL DS100: A compact USB hi-res audio decoder that pairs with powered monitors or a headphone amp; choose the U2 PRO only if you already own a DAC that needs a digital feed.
Yes. Every unit we sell is genuine and brand-new, shipped in its original packaging with a valid serial number, and backed by our 1-year warranty and 45-day returns.
How long does shipping take?
Orders ship within 3 business days, with full tracking. Shipping to the US is free on every order, and most US orders arrive within 7–15 business days — see our shipping policy for details.
What if it isn't for me?
You get 45 days to decide. Keep the packaging, keep it in like-new condition, and send it back for a refund. Ear tips unsealed for hygiene reasons are fine — we expect you to actually listen.
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