S.M.S.L SU-3 Desktop Audio DAC
The S.M.S.L SU-3 builds upon the design philosophy and performance of the SU-1 with significant upgrades. It incorporates the latest-generation AK4496 DAC chip and advanced 32-band PEQ technology, along with balanced XLR outputs. Through meticulous tuning and optimization, it delivers more detailed, pure, and emotionally engaging musical performance in a compact desktop form factor.
AKM AK4496 DAC Chip
At the core of the SU-3 is a single AKM AK4496 DAC chip, carefully tuned to achieve an exceptionally low distortion of 0.00012% (-118 dB). This high-performance converter provides clean, detailed conversion with high dynamic range and signal-to-noise ratio, resulting in transparent and refined audio reproduction.
XMOS XU-316 USB Platform
The SU-3 utilizes the latest XMOS XU-316 platform, supporting high-resolution playback up to 32-bit/768 kHz PCM and native DSD512. Asynchronous USB transfer ensures stable, low-jitter data handling from computers and compatible digital sources.
32-Band Parametric EQ with Memory
Advanced 32-band PEQ technology allows precise sound customization. EQ settings are retained after power-off, enabling users to store preferred frequency adjustments for consistent listening across sessions.
Balanced XLR and Single-Ended RCA Outputs
The SU-3 provides both balanced XLR (4 Vrms) and single-ended RCA (2 Vrms) line outputs. This versatile connectivity supports a wide range of amplifiers, active speakers, and desktop systems while maintaining high signal integrity.
Dual High-Precision Femtosecond Oscillators
Dual high-precision, low-phase-noise femtosecond oscillators ensure accurate clocking and reduced jitter, contributing to cleaner digital-to-analog conversion and improved overall sonic performance.
High-Performance Power Filtering
A built-in high-performance power filtering system allows the SU-3 to reach optimal performance using only USB bus power, eliminating the need for an external power adapter in most setups while minimizing noise.
Ultra-Compact CNC Aluminum Design
The chassis is crafted from anodized CNC aluminum alloy with an artistically precision-machined front panel. Its ultra-compact size (116 × 40 × 87 mm) and 310 g weight support multiple placement options, combining modern industrial aesthetics with solid build quality and effective shielding.
Hi-Res Audio Certification
The SU-3 is certified by the Japan Electronics and Audio Association as Hi-Res Audio, confirming its capability to reproduce high-resolution music formats accurately.
About SMSL
Foshan ShuangMuSanLin Electronics Co., Ltd. (SMSL) is an established manufacturer specializing in high-fidelity desktop audio equipment. The company focuses on digital-to-analog converters, headphone amplifiers, and related products, known for combining solid measured performance, clean industrial design, and practical features.
Technical Specifications
Input: USB / Optical / Coaxial
Output: XLR / RCA
Output Level: XLR 4 Vrms, RCA 2 Vrms
THD+N: 0.00012% (-118 dB)
Dynamic Range: 126 dB (XLR), 123 dB (RCA)
SNR: 126 dB (XLR), 123 dB (RCA)
USB Transfer Mode: Asynchronous
USB Compatibility: Windows 7 / 8 / 8.1 / 10 / 11, Mac OS X 10.6 or later, Linux
Bit Depth: USB 1 bit – 32 bit; Optical/Coaxial 16 bit – 24 bit
Sampling Rate (USB): PCM 44.1 kHz – 768 kHz, DSD 2.8224 – 22.5792 MHz
Sampling Rate (Optical/Coaxial): 44.1 kHz – 192 kHz
Power Consumption: < 5 W
Standby Power: < 0.1 W
Size: 116 × 40 × 87 mm (W × H × D)
Weight: 310 g / 0.683 lbs
Q&A
What DAC chip does the SMSL SU-3 use?
It uses a single AKM AK4496 DAC chip, tuned for 0.00012% (-118 dB) THD+N.
What is the maximum resolution supported via USB?
PCM up to 32-bit/768 kHz and native DSD up to DSD512 via the XMOS XU-316 platform.
Does the SU-3 support parametric EQ?
Yes, it features 32-band PEQ with settings retained after power-off.
Does the unit offer balanced outputs?
Yes, it provides balanced XLR (4 Vrms) and single-ended RCA (2 Vrms) outputs.
Can the SU-3 operate on USB bus power alone?
Yes, the built-in high-performance power filtering allows optimal performance via USB bus power.
What digital inputs are available?
USB, Optical, and Coaxial.
