SW1X Audio Design™ USB II Performance Level 2 USB to SPDIF Converter


SW1X Audio Design™ USB II is a USB to SPDIF converter with all HV valve rectified CLC power supplies for the EC88 valve master clock and E86C valve SPDIF output stage.

It is similar to USB I Signature but in addition to that employs 6X5GT valve rectified and choke filtered power supplies for the E86C valve.




SW1X Audio Design™ USB II Interface Features:

  • Specially selected and harmonically matched component & material quality
  • Master clock is based on low noise EC88 triode tube powered by a separate transformer and is output transformer de-coupled from the rest of the circuit
  • Power supply of valve master clock is valve rectified and choke filtered (CLC)
  • Custom Shunt regulated power supply based on a Germanium transistor for the USB/SPDIF receiver/transmitter
  • 3 separate power transformers: one for the master clock and one for the USB receiver and one for tube S/PDIF digital signal output stage
  • E86C tube buffered S/PDIF output stage (choke filtered) with 6X5GT valve rectified CLC power supply
  • Finest high end audio components everywhere: Black Gate, Kaisei capacitors, Telefunken diodes, Allen-Bradley carbon resistors, pure silver wire and silver plated RCA connectors
  • Plug’n’Play with USB OTG- no drivers required for Mac, Windows, Linux and Android operating systems (works with Samsung Galaxy and Android TV box, iPad 3)
  • Asynchronous USB data transfer mode (sounds best with a dedicated, unpowered USB interconnect such as SW1X AERO 5 USB)
  • Bit perfect data transfer with Kernel streaming, ASIO and WASAPI supported
  • Resolution 16/24 bit, 32KHz, 44.1KHz, 48KHz, 88.2KHz, 96KHz (higher resolution than 24 bit is not supported by S/PDIF anyway)
  • 110/115/230/240V AC mains transformers


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We do not recommend purchasing a key system component without first auditioning it carefully, which is why we have demonstration rooms and a flexible home loan policy.

However in certain situations it can be difficult for people to get to our showroom and for those instances we can offer our mail order service.

For demonstration and ordering click here

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