Our C 390DD DAC/Amplifier is a new concept in amplification and in high definition audio system architecture. Featuring Direct Digitalâ„¢ technology first introduced in our now famous M2 Direct Digitalâ„¢ Amplifier, the C 390DD will amaze with its transparent, dynamic and detailed sound quality. The most accurate DAC/amplifier ever devised, the C 390DD is packed with loads of power, MDC upgradability, software defined operation (offering simple software updates), and exclusive NAD features. Rethink how a music system should look and sound.