With NAD’s innovative Modular Design Construction, adding the latest cutting-edge technology can be as simple as a software upgrade and slipping a new hardware module into your stereo NAD amplifier. The MDC USB DSD is the latest MDC module from NAD that adds USB Audio 2 PCM and DSD playback capability to six of our most popular stereo (pre-) amplifiers (M33, M32, M12, C 388, C 368, C 658). Experience the convenience of computer music playback and streaming, in high resolution up to 24-bit/192kHz PCM and DSD256, combined with the musical performance of your NAD hi-fi system.