Adcom GCD-300 (circa 1985–1991)
Documentation on the Adcom GCD-300 is thin, and the production span is unclear. A period Audio advertisement (December 1985, p.9) already featured the player, while a secondary database lists 1991 as its release year. It is a compact disc player built around a 4x oversampling digital filter and dual 18-bit D/A converters, fed by a B&O-type two-beam laser mechanism. Audio (January 1993) described it as “very clean and open, with good detail and soundstaging - a solid performer for the money.” Adcom's own copy in that December 1985 issue touted a “Sound Phase-Correcting Circuit” and a “Frequency Contour Selector,” aimed at preserving stereo imaging and spectral balance. The original price has not survived in the public record. No detailed service manual or circuit-level information is known to exist.
Known specifications from period sources:
- Power Output: 2.0V ± 1.5dB
- THD: 0.004% @ 1kHz
- Frequency Response: 5Hz–20kHz ± 0.5dB
- Signal-to-Noise Ratio: 95dB
- Dynamic Range: >95dB
- Channel Separation: >90dB @ 1kHz
- Wow & Flutter: ±0.001% WRMS
- Dimensions: 17″ × 3.5″ × 12.5″ (W×H×D)
- Weight: 13 lbs
No collectibility pricing, common failure points, or original packaging information has been documented. The GCD-300 is a sparsely recorded entry in Adcom's CD player line, and most of what survives is a handful of specs and two magazine mentions.
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