Singxer SU-1 USB Digital Interfacesearch

Singxer SU-1 USB Digital Interface

Singxer SU-1 USB Digital Interface

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Advanced USB Digital Interface

Not happy with your DAC’s current USB performance? The Singxer SU-1 USB digital interface allows a great bypass, with many claiming it brings an improvement to the default USB interface of their high-end DACs. This digital interface allows you to connect your DAC or receiver to your computer using coaxial, and will come in handy for audiophiles who want to bypass DACs with outdated USB interfaces, or those incompatible with their current setup. It features the highly regarded XMOS XU208 chip, which uses a more advanced process technology than previous XMOS chips. With more output options than the lower-priced F-1, the SU-1 includes an XLR balanced output, AES, I2S, S/PDIF, MCLK/WCK, and L2S through HDMI. It’s compatible with Windows, Mac OS X, Linux, and Android with the installation of a driver. A USB/coaxial cable is not included.

Note: This drop is for the black unit with the 110V power option.

The Reviews Are In

Head-Fi user project86 says, "The Singxer brought at least a small improvement to almost every DAC I tried. Interestingly, there was no real correlation between price and potential performance improvement. The Yulong D200 at $699 shows a very modest gain, while my Calyx Femto, which sells for roughly 10 times as much, gives a comparatively massive improvement; it's almost like listening to a whole new DAC. The obvious answer is that an expensive DAC should be more resolving and thus better able to showcase a superior source… I won't go on and on about each individual DAC other than to say A) the results were often surprising, and B) $399 was definitely worth it in the majority of cases."


Sampling Rates

  • PCM: 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384 kHz
  • I2S supports all sampling rate, S/PDIF supports up to 192 kHz
  • DSD: 2.8 MHz (DSD64), DOP, native; 5.6 MHz (DSD128) DOP, native; 11.2 MHz (DSD256) native
  • I2S output supports all DSD; S/PDIF, AES/EBU support DSD64 DOP mode

Bit Width

  • Up to 32 bit over I2S output
  • Up to 24 bit over S/PDIF
  • USB input socket is a standard USB-B type socket, USB power supply range 4.5V–5.1V
  • RCA connector outputs standard S/PDIF signal, electrical level is 550 mV (standard connection load), output impedance of 75 ohms
  • Power supply input is AC 115V/230V using TALEMA transformer

System Compatibility

  • Windows XP, Windows 7, Windows 8, Windows 10: 32/64 bit, need installed driver
  • Native Mac OS 10.6 and later: Use own driver
  • Native Linux with UAC2 compliant kernel: Use own driver
  • Android OS 4.2 and above: Need support OTG function

I2S Port Using HDMI Output

  • Electrical level is 3.3V LVDS differential signal
  • DSD ON signal, 5V power supply, CPLD has processed the mute signal (no need to process again)
  • DSD ON signal can be user defined, DSD ON signal can be connected to PIN 13, 14, 15, 16 on the socket
  • You can adjust the phase of PIN 1–3 and PIN 7–9 with a switch

Flexible HDMI-I2S Output Configuration

  • Switch 1–4 is for PIN13–16 on the HDMI socket
  • When you turn “ON”, it means that HDMI PIN has DSD_ON function
  • Switch 5 is clock output mode, “OFF” is MCLK, “ON” is WCK
  • Switch 6 is for HDMI PIN1–3 and PIN 7–9 phase, ON is positive phase, OFF is negative phase (ON is for Gustard DAC, OFF is for PS Audio)
  • If using Gustard DAC, turn Switch 3 and 6 to “ON”, others to “OFF”
  • Switch 7 and 8 are standby


All orders will be shipped by Massdrop.

Estimated ship date is July 11, 2018 PT.

After the drop ends, payment will be collected and the group’s order will be submitted to the vendor up front, making all sales final. Check the discussion page for updates on your order.