SW1X USB I Signature SPDIF Converter

SW1X Audio Design™ USB I Signature Performance Level 1 USB to SPDIF Converter


Limited edition version of USB I with point to point wiring, Black Gate, AN Kaisei capacitors in the powers supplies of the tube buffered SPDIF output and the shunt regulated power supply of the USB receiver chip and of the vacuum tube master clock. All signal paths including mains inlet are wired with silver wires.

It is all about musical performance.

Achievable only with an elegant minimalism-purism design and finest materials

In order to retrieve the last nuances of musical information, every detail matters



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SW1X Audio Design™ USB I Signature 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
  • Custom Shunt regulated power supply based on a Germanium transistor for the USB/SPDIF receiver/transmitter
  • 2 separate power transformers: one for the master clock and one for the USB receiver / tube S/PDIF digital signal output stage
  • E86C tube buffered S/PDIF output stage (choke filtered)
  • 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


Reviews and customer’s feedback can be found here



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Ideal partner to SW1X DAC I Signature, please click on the picture below

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Dimensions: Height (mm) 130 x Width (mm) 220 x Depth (mm) 311

Weight (kg): 4.6

Max Power Consumption (W): 25

Output Impedance (Ohms): <1

Tube Compliment:  EC88, EAA91, E86C or E180F


SW1X Audio Design™ USB I Signature is available on custom built to order basis only



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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