Adcom GFA-7500
Almost everything known about the Adcom GFA-7500 comes from a pair of period reviews in HiFI-Stereo. It was a THX-certified multichannel power amplifier built for home theater. Five modular amplifiers share one chassis, each with custom matched output devices. It was meant to be paired with a surround processor, not used as a standalone stereo amp. HiFI-Stereo (May 1998, p.5) called the power supply unusually generous for a multichannel design: a 20-pound toroidal transformer backed by over 120,000 µF of filter capacitance. The same review claimed the amp could deliver 1125 watts into a 4-ohm load. That is likely a bridged or total-system figure, not a per-channel rating.
HiFI-Stereo (July 1998, p.60) added that the GFA-7500 did not include input-level adjustments — a sensible feature given its intended use with surround processors that already handled channel calibration — and noted the carefully finished metalwork. The reviewer framed the amp as the logical next step for anyone who found home theater receivers lacking in real-world dynamic headroom, especially with demanding soundtrack material. No per-channel power ratings, dimensions, weight, or original price have surfaced in the available record.
- Type: THX-certified multichannel power amplifier (5 channels)
- Power supply: 20 lb toroidal transformer, 120,000+ µF filter capacitance
- Claimed output: 1125 W into 4 Ω (system total, per review)
- Design: Five modular amplifiers with custom matched output devices
- Period: Reviewed mid-1998
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