NAD 502
Not much is documented about the NAD 502 beyond a single period product notice. It was a no-frills CD player built around a 1-bit MASH D/A converter with 18-bit resolution. A five-pole (30 dB per octave) analog output filter followed it, meant to suppress sampling artifacts. A wireless remote with a numeric keypad handled direct track access, and a coaxial digital output was included. HiFI-Stereo (July 1993, p.21) listed the price at $299. That short entry is essentially all that survives in the contemporary record. No production years, measured performance, or later reviews have turned up.
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