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SRC•DX USB to Dual-Coax Bridge

SRC•DX USB to Dual-Coax Bridge

Regular price $295.00 $295.00 Sale

SRC•DX™ is a revelation for software upscaling: a low RF noise USB to single or dual-coax S/PDIF bridge supporting 705.6/768kHz PCM thats fully compatible with FPGA-based upsamplers and high-end music servers. Eschewing a direct USB-to-DAC interface means the DAC's USB receiver chip is turned off—resulting in less internally generated RF noise. S/PDIF's self-clocking protocol is inherently much simpler than USB and SRC•DX's low power consumption lowers RF noise further still. This helps to elevate the quality of server-based sources so that PGGB, HQPlayer, Roon and other capable software can sound as good as possible. 

SRC•DX is USB 2.0 class-compliant for plug-and-play operation with Windows, macOS and Linux—powered by the 5V USB port. A push-button selects standard or high level for signal compatibility with all DACs. Status LEDs indicate single-coax or dual-coax mode of operation. BNC connections ensure reliable transmission of high-speed digital audio. 



  • SRC•DX
  • Free sample of STABILANT•22 (while supplies last)
  • Support for Windows 10(WASAPI), macOS(Core Audio) or Linux(ALSA) is part of the OS (no need to download a driver)
  • Latest Windows 7/8/10/11 ASIO driver (December 2021) can be downloaded here. Only download and install if required.
  • Service Note for Volume issue with Linux Sources here. (01/24: SOTM Fixed in Version 0.5.5. Choose 'Max Volume' button)
  • Service Note for Firmware Update (December 2021) here


  • SRC-DX User Manual (2021) here.
  • Download HQPlayer Desktop here. (Free trial mode available)
  • Recommended HQPlayer filter settings are here
  • Download PGGB offline upsampler here(Free trial mode available)
Input Format: USB 2.0 High Speed (480 MB/sec)
Output Formats: S/PDIF (Consumer) - format & signal level
AES/EBU (Professional) - format & signal level
Chord Electronics DX (single or dual coax) - format & signal level
Dimensions (LxWxH): 3.5" x 2.0" x 1.0" (90mm x 50mm x 25mm) 
Shipping Weight: ~0.55 lbs (0.25 kg) 
Power: USB DC 5V @ 50mA