QLS Audio, HI-FI/HI-END Audio,DAC,WAV Player




QA730U XMOS USB to Spdif Converter DAC USB Digital Interface

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QA730U is an asynchronous High Speed USB to digital audio interface that extracts the highest possible audio quality from computer audio sources.

The QA730U streams bit perfect audio data up to 24-bit @ 192kHz, providing a signal clear, and true to its source. The QA730U will output true, 24-bit audio files and supports all these sample rates: 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz.

The QA730U is finely designed to work within your digital system. Your digital system will function together as parts of an instrument. Your QA730U is built to fit effortlessly into your system, becoming a “bridge” between your computer and your DAC.

Great care was taken in the design of the QA730U to isolate the noisy computer/USB environment from the digital audio output. The USB receiver and processing are powered by the computer, while the output line drivers are powered by a separate isolated linear power supply.

The QA730U's USB is designed to work with both Apple Macintosh and Windows PC computers. Microsoft Windows PC’s require the included Windows driver which works with Windows XP, Vista and 7 and windows 8 and Windows 10.

24bit/192KHz wav and DSD Support

QA730U supports Studio Master wav files in 24bit/192KHz and DSD64/1bit/Stereo.  DSD files can be streamed out of the digital output in DoP format.


  • U8A - Chipset Support, 32BIT 500MIPS / Digital Signal Processing The, Inside Has Eight Cores XMOS
  • USB audio synchronization endpoint operates in the asynchronous mode
  • Internal master clock circuitry lowers the jitter operation of the USB endpoint
  • Input: USB2.0 ,USB3.0
  • Support Sampling: 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz (Up to 24bit),
                                DSD64(I2S or Coaxial by Dop), DSD128(Only I2S),
  • Digital output:
    - RCA Coaxial
    - Optical
    - I2S (RJ45)
  • WordClock Output: The QA730U is including the low-jitter wordclock output for direct synchronizing external d/a converters.
  • Output Level: 0.5 Vp-p (at 75 Ohms)@SPDIF,
                        3.3V p-p (25MA)@I2S,
                        3.7V P-P (50MA)@WordClock,
  • External power supply: 9V-12V DC >500mA or =500mA (5.5mm*2.1mm or 5.5mm*2.5mm)
  • Dimensions: 110mm*130mm*27mm
  • Weight: 0.34kg
  • Package Dimensions: 180mm*155mm*63mm
  • Package Weight: 0.60kg
  • Supported systems:
    NO Drivers needed for Mac OSX 10.6+ and Linux with UAC2 compliant kernel.
    Drivers for windows XP to Win10 32-64bit included at no fee.
    PC Drivers download:
    or  http://www.qlshifi.com/down/XMOS%20USB%20Audio%202.0%20Driver(V2.23).rar   


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Internal PCB board:
(In order to improve the quality and sound quality, components are subject to change without notice.)

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The following items are included with your Order:
  QA730U *1
  USB Cable * 1
  DC9V Power  Supply *1

User Guide *1

This Discontinued Products

Payment methods 2: 
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