The SMSL D1 delivers high-quality D/A conversion in an extremely compact package, making it an excellent choice for desktop audio systems and Hi-Fi configurations where a combination of sound quality, simplicity, and small size is important.
At the heart of the device is a ROHM BD34352EKV DAC chip, with a carefully optimized circuit that SMSL claims a THD+N of just 0.00038 % (-108 dB). Dynamic range and signal-to-noise ratio are 119 dB, and the analog stereo RCA output provides an output level of 2.0 Vrms.
For connection to a computer, the D1 uses an XMOS XU-316 USB interface with asynchronous transfer. It supports PCM audio resolutions up to 32-bit/768 kHz via USB, as well as DSD512. For connecting to a TV, CD transport, streamer, and other digital sources, optical and coaxial S/PDIF inputs with support for up to 24-bit/192 kHz are available.
A particular advantage of the D1 model is its convenient power supply. The built-in power filtering system allows for optimal performance even when powered via USB, without the need for a large external power supply. The device consumes less than 5 W, or less than 0.1 W in standby mode.
Specifications:
| Specification | SMSL D1 |
|---|---|
| Device type | Hi-Res USB DAC / D/A converter |
| DAC chip | ROHM BD34352EKV |
| USB controller | XMOS XU-316 |
| Digital inputs | USB, optical, coaxial |
| Analog output | Stereo RCA |
| USB PCM | up to 32-bit / 768 kHz |
| USB DSD | up to DSD512 / 22.5792 MHz |
| Optical / coaxial | up to 24-bit / 192 kHz |
| Output level | 2.0 Vrms |
| THD+N | 0.00038 % (-108 dB) |
| Dynamic range | 119 dB |
| SNR | 119 dB |
| USB transfer | Asynchronous |
| USB compatibility | Windows 7 / 8 / 8.1 / 10 / 11, macOS, Linux |
| Consumption | <5W |
| Standby consumption | <0.1W |
| Dimensions (W × H × D) | 101 × 33 × 90.1 mm |
| Mass | 201.1 grams |
| Housing | CNC machined anodized aluminum alloy |
| Color | Black |
| Certificate | Hi-Res Audio |
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