HELIX HEC HD Audio USB Input Module Provides high-resolution USB digital input for a HELIX DSP PRO MK2 processor at Crutchfield
HELIX HEC HD-AUDIO USB-INTERFACE – HARRIOX GROUP
MATCH MEC HD-Audio USB Interface USB input module for MATCH UP 7BMW amp/processor: provides high-resolution USB digital input (Model USB-UP7BMW) at Crutchfield
HELIX HEC HD-AUDIO USB-INTERFACE DSP ULTRA THE BEST QUALITY, NEW, WARRANTY | eBay