Denon PMA-630
The Denon PMA-630 is a stereo integrated amplifier from around 1980, and not much is documented about it. The record shows it was a minor modification of the Denon PMA-600. It shares that model's 65-watt "compact" rating. The main changes were an altered gain factor and an added LED power indicator. Hi-Fi/Stereo Buyers (May 1980, p.57) listed the PMA-630 at $465 and called it an 80-watt FTC-rated amplifier. That sits oddly against the 65W figure from other sources, so treat the power rating with some caution.
The same listing noted a dual-range subsonic filter (20 Hz and 40 Hz), a loudness contour, automatic dubbing to and from either of two tape decks, and a recorder output disconnect. It also mentioned pull-out shorting bars for the signal path, presumably for inserting an equalizer.
Beyond that, almost nothing is confirmed. Production years, original documentation and owner reception are all undocumented. The known specs are:
- Integrated amplifier, minor revision of the PMA-600
- Rated at 65W "compact" (one source lists 80W FTC)
- LED power indicator
- Changed gain factor versus the PMA-600
- Dual-range subsonic filter (20 Hz / 40 Hz)
- Automatic dubbing between two tape decks
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