Adcom GCD-575
Little is documented about the Adcom GCD-575 beyond period audio advertising and a few review mentions. What the record shows is a CD player built to sound closer to analog, using a few specific engineering choices.
The GCD-575 used a 176.4 kHz sampling rate with dual D/A converters. HiFI-Stereo (September 1988, p.14) noted that this let it run low group-delay digital and analog filtering. The same source pointed out the 100 ohm output impedance. That is a low figure, meant to let the player drive a wide range of downstream equipment without losing signal integrity. A full-function remote with random-access track selection was included.
Adcom’s own advertising (seen in Audio, October 1988, p.166) said the GCD-575 reproduced “not just bits.” It stressed the analog frequency/phase contouring and a Class A output stage - a circuit topology more commonly found in high-end preamplifiers at the time. That suggests the company put sonic refinement ahead of raw measured numbers. No production years, original price, or detailed service data have survived in the public record.
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