Direct Digital Trickles Down (and Up)
NAD's C 510 inherits its impressive innards from the company's M2 Direct Digital Amp (see Stereophile's review
) and M51 DAC (see Stereophile's review
). All incoming digital data (up to 24/192 PCM), the C 510 does not offer any analog inputs, is converted to a pulse-width-modulation (PWM) signal at a sampling rate of 844kHz before being converted to analog. Volume control is also handled in the digital domain and the C 510's 35-bit architecture allows for transparency at any level, in theory. Here's more from NAD, "Due to the very high clock speed [108MHz] and mathematical precision of our reconstruction filters, the resulting audio signal is totally free of digital artifacts like ringing." I suppose the only question remaining is—does all this work to make digital sound less...digital?