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Compact aluminium DAC with glass front, touch controls, USB-C, optical, coaxial and RCA connections

SMSL Audio

SMSL Audio D1 2 in 1 accessory

SKU CH-REMB-525YE

Hi-res USB DAC with optical, coaxial and dual USB-C inputs, ROHM BD34352EKV chip decoding 768 kHz/32-bit, RCA output, touch controls, aluminium chassis

  • High-fidelity sound from ROHM BD34352EKV chip decoding up to 768 kHz / 32-bit
  • Quick function switching via responsive touch-sensitive buttons
  • Space-saving mini aluminium chassis fits any desktop setup
  • Versatile connectivity with optical, coaxial, dual USB-C inputs and RCA output
  • Long-term reliability from premium audio components and organic glass front panel

What the SMSL D1 is

The SMSL D1 is a compact USB DAC and digital audio converter that uses a ROHM BD34352EKV chip to decode PCM up to 768 kHz and 32-bit depth. It connects to computers, phones or media players through dual USB-C, optical or coaxial inputs and sends analogue sound out via RCA sockets. The aluminium chassis and glass front panel keep the footprint small on a desk or beside a TV system.

Thermals noise and power draw

The unit draws power directly from the USB-C connection and runs without a fan, so it adds no audible noise to a quiet listening environment. Its low current requirement means it works from standard laptop or phone ports without an external supply. The all-metal case acts as a passive heatsink, keeping the decoding chip at a stable temperature during extended playback sessions.

What this replaces and when to upgrade

The D1 replaces a computer's built-in headphone jack or a basic USB sound dongle when cleaner line-level output is needed for powered speakers or an external amplifier. It is not suited for buyers who require balanced XLR outputs, headphone amplification or wireless streaming. The jump is worthwhile when the source device only offers noisy analogue outs or lacks optical and coaxial digital inputs.

Highlights

  • High-fidelity sound from ROHM BD34352EKV chip decoding up to 768 kHz / 32-bit
  • Quick function switching via responsive touch-sensitive buttons
  • Space-saving mini aluminium chassis fits any desktop setup
  • Versatile connectivity with optical, coaxial, dual USB-C inputs and RCA output
  • Long-term reliability from premium audio components and organic glass front panel

Specifications

No published specifications for this item yet.

Questions about this item

How do I connect the SMSL D1 to my computer using the dual USB‑C inputs and avoid the common mistake of selecting the wrong input?

Plug one USB‑C cable from your computer into either USB‑C port, then press the touch‑sensitive button to cycle until the USB input indicator lights; the unit defaults to the last active input, so confirm the correct source each power‑on.

What maintenance will the ROHM BD34352EKV decoding chip and aluminium chassis need over time?

No user‑serviceable parts inside; keep ventilation slots clear of dust and wipe the organic glass front panel with a dry microfibre cloth — internal components are rated for long‑term stable operation.

At what sample rate does the DAC hit its decoding ceiling during extended playback sessions?

The chip decodes up to 768 kHz at 32‑bit; sustained streams at that rate remain within spec, so the first limit encountered is the source file’s own maximum resolution.

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