Premium Analog Devices AD1853 24-bit/192 kHz Digital to Analog Converter IC All inputs feature jitter reduction and are re-clocked and up-sampled to 422 kHz / 24 bit USB input for playing music from PC or Mac (driver-less for easy setup) Asynchronous sample rate conversion for all inputs including the USB input Works with any format file on your computer up to 96 kHz / 24 bit Works in variable volume mode in Windows® for connecting direct to a power amp (no preamp needed) Optical and Coaxial digital inputs for use with any standard digital connection RCA unbalanced and XLR balanced analog outputs High current headphone output with volume control can drive any headphones from 32 to 600 ohms Oversized internal toroid power transformer (not a wall wart like many competitors) Will always power back up to the same input in the event of an AC power outage Available in Silver or Black (Rack mount option available for Black units)