SMSL SU-X Balanced MQA Desktop DAC


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The Pinnacle of Precision Audio

Meet the SMSL SU-X MQA Audio DAC, SMSL’s brand-new flagship desktop digital-to-analog converter for audiophiles. Packed with top-shelf components like dual ESS ES9039MSPRO DAC chips, an XMOS XU-316 USB controller, and a Qualcomm Bluetooth 5.1 chip, it offers unparalleled sound quality for audiophiles who appreciate the finer details in sound.

Dual DAC Delight

The heart of the SU-X lies in its dual ESS ES9039MSPRO DAC chips. These powerhouses ensure the most accurate audio reproduction of tracks up to 32-bits and 768kHz, enabling you to hear every nuance of your favorite tracks. Additionally, the built-in MQA decoding brings studio-quality sound right into your living room.

Cutting-edge Connectivity

With the XMOS XU-316 USB chip, the SU-X offers a true 32-bit USB solution. Whether you're streaming high-resolution PCM or DSD files, this DAC has got you covered with support for up to 768kHz PCM and DSD512.

Anti-jitter Juggernaut

The CK-03 clock processing circuit in the SU-X is a game-changer. It significantly reduces clock jitter, ensuring a pristine, crystal-clear audio signal.

Powerful Precision

Two groups of linear power supplies for digital and analog units minimize noise and enhance performance, ensuring that your music is always delivered with the utmost fidelity.

Intuitive Interface

Gold-plated inputs and outputs not only add a touch of class but also ensure the best possible connection for your audio equipment. The full-fit color IPS display brings a sleek, modern touch, making the SU-X a standout piece in any audio setup.

Bluetooth Brilliance

Wireless audio doesn't have to mean compromised quality. With Qualcomm aptX Bluetooth and LDAC support, high-resolution 24-bit streaming is effortless and elegant.

Product highlights

  • Dual ESS ES9039MSPRO DAC chips
  • MQA and MQA-CD decoding
  • XMOS XU-316 USB chip for true 32-bit audio
  • CK-03 clock processing circuit for reduced jitter
  • Separate linear power supplies for digital and analog circuits
  • Supports PCM up to 768kHz and DSD up to DSD512
  • Gold-plated I/O interfaces
  • Qualcomm aptX and LDAC Bluetooth support
  • Full-fit color IPS display with tempered glass
  • High-quality aluminum alloy housing


  • Input: USB/Optical/Coaxial/Bluetooth/I2S/AES
  • Output: RCA/XLR
  • Line output amplitude: XLR 5.2Vrms; RCA 2.5Vrms
  • THD+N: 0.00005%(-126dB)(UN-WTD)
  • Dynamic range: 135dB (XLR); 128dB (RCA)
  • SNR: 135dB (XLR); 128dB (RCA)
  • USB transmission: USB 2.0 asynchronization
  • USB compatibility: Windows 7 / 8 / 8.1 / 10 / 11 (driver-required); Mac OSX 10.6 above; Linux (No driver)
  • MQA decoder: USB / Optical / Coaxial / AES
  • MQA-CD decoder: Optical / Coaxial / AES
  • Sampling rate & Bit Width:
    • USB PCM: 44.1~768kHz (32bit)
    • DSD: 2.8224~22.5792MHz (1 bit)
    • Optical / Coaxial: 44.1~192kHz (24bit)
    • DOP: DoP256(USB), DoP64 (Optical / Coaxial/ AES)
  • Bluetooth specification:
    • LDAC: 24bit/96kHz (990kbps/660kbps/330kbps)
    • aptX-HD: 24-bit/48 kHz 576 kbps
    • aptX: 16-bit/44.1 kHz 352 kbps
    • SBC: 16-bit/44.1 kHz 328 kbps
    • AAC: 16-bit/ 44.1 kHz 320kbps
  • Power Consumption: <20W
  • Standby power: <0.5W
  • Size: 9.84” x 2.01” x 8.54” (W x H x D)
  • Weight: 5.95lbs

What’s included

  • Newly designed remote control
  • Power cable
  • User manual

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