The SMSL SU-1o audio system manual provides installation, operation, specifications, remote control and warranty information.
This manual explains how to install the SMSL SU-1o audio system in a well‑ventilated, dry location and outlines safety precautions, warranty terms and service procedures. It also describes the remote control functions, component layout and how to connect various inputs such as USB, optical, coaxial, Bluetooth, I²S and AES.
Detailed sections cover the system’s digital filtering options, sound‑color modes, DPLL settings, Bluetooth pairing and reset procedures, as well as technical specifications like THD+N, dynamic range, power consumption, dimensions and supported audio formats. This manual is written in Chinese.
| Input methods | USB / Optical / Coaxial / Bluetooth / I2S / AES |
|---|---|
| Output methods | Single‑ended line / Balanced line |
| Line output amplitude (balanced) | 5.1 Vrms |
| Line output amplitude (single‑ended) | 2.6 Vrms |
| THD+N | 0.00005 % (-125 dB) |
| Dynamic range | 135 dB (XLR) / 128 dB (RCA) |
| Signal‑to‑Noise Ratio | 135 dB (XLR) / 128 dB (RCA) |
| USB specification | USB 2.0 asynchronous transfer |
| Supported sampling rates (USB PCM) | 44.1 kHz – 768 kHz (32‑bit) |
| Supported DSD rates | 2.8224 MHz – 22.5792 MHz (1‑bit) |
| Power consumption (max) | < 30 W |
| Standby power | < 0.5 W |
| Dimensions | 240 mm × 185 mm × 39 mm (W×H×D) |
| Weight | 1.86 kg |
Long‑press the middle button of the knob while in Bluetooth mode to reset the Bluetooth pairing status.
The SU-1o supports LDAC (24‑bit/96 kHz), aptX‑HD (24‑bit/48 kHz), aptX (16‑bit/44.1 kHz), SBC (16‑bit/44.1 kHz) and AAC (16‑bit/44.1 kHz).
The total harmonic distortion plus noise is 0.00005 % (‑125 dB).
Only the specified voltage may be used; using a higher voltage is dangerous and may cause fire or damage.