Nuforce DIA-RED Digital Input Amplifier (Red) (Discontinued by Manufacturer) 1 pair industry-standard To slink fiber-optic inputs, 1 coaxial-S/PDIF input S/PDIF inputs up to 24-bit/192kHz Audiophile-grade D/A converter for low noise and clarity The absence of capacitors in the signal path allows for heightened purity, lower distortion, a wider, deeper sound-stage and better-detailed imaging. High-performance, Digital-controlled volume pot with remote control