I have two of these so selling the one - Ideal for software upsampling from HQPlayer, remastero PGGB and other upsampling software. Utilises the Dual BNC connectors of the Chord Dave, TT2 & Qutest DACs. Doesn't work with non FPGA DACs.

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.