Akai GXC-750D
HI-Fi-Stereo-Buyers (September 1978, p.69) listed it at $695 including a wood cabinet. The feature list: Dolby B noise reduction, Akai's proprietary Automatic Distortion Reduction System (ADRS), microphone/line input mixing, and a four-position tape selector (normal low bias, normal high bias, ferrichrome, chrome). The VU meters could be switched between standard VU and peak-reading mode.
High Fidelity (August 1978, p.47) measured the deck and found it generally competent but unexceptional. Harmonic distortion was about average for the period. The reviewer noted that the deck seemed to compress peaks a bit more than desirable, and playback frequency response rolled off at the extreme ends of the spectrum. When carefully adjusted - using TDK SA for chrome and Sony ferri for high-energy ferrics - recorded copies were "at least reasonable likenesses of the original." The review concluded that with normal care and reasonable recording levels, the deck would not embarrass its owner.
Known specifications from period testing:
- THD at 0 VU: 0.8%, with 5 dB headroom to 3% THD
- Signal-to-noise ratio: 52 dB wideband, 60 dB narrowband (referenced to 0 VU)
- Maximum output level at 0 VU: ~500 mV
Beyond these magazine reports, little is documented about the GXC-750D. No service manual, production years, or original sales brochures appear to have survived in common archives.
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