Fisher RS-646
Little is documented about the Fisher RS-646 beyond its appearance in period advertisements. Going by those ads, it was an audio/video receiver with Dolby Pro-Logic surround sound. That put it in the early-1990s wave of home theater receivers built to bring multi-channel audio into the living room.
HiFI-Stereo (October 1991, p.43) ran a full-page ad for the RS-646 with the tagline "Everything Else Is Just An Accessory." The ad claimed 120 watts per channel (front left/right, minimum RMS, 8 ohms, 20Hz-20kHz, ≤0.05% THD). It also claimed a five-channel Pro-Logic stage with 20 watts each to the rear speakers (≤0.4% THD) and 20 watts to a dedicated center channel (≤0.02% THD). The ad also called out "True Audio/Video Switching" and Class A-II circuitry. A nearly identical ad ran in the same publication a few months later (January 1992, p.53), so the model was on the market for at least that span.
No service manual, user guide, or independent review of the RS-646 has surfaced in the Archive's research. The known specifications are limited to what the manufacturer chose to publish in those ads. Dimensions, weight and original price have not been confirmed.
Known specifications (from period advertising):
- Type: A/V receiver with Dolby Pro-Logic surround
- Front L/R power: 120 W × 2, 8 Ω, 20 Hz–20 kHz, ≤0.05% THD
- Rear L/R power: 20 W × 2, 8 Ω, 20 Hz–20 kHz, ≤0.4% THD
- Center channel power: 20 W × 1, 8 Ω, 20 Hz–20 kHz, ≤0.02% THD
- Class A-II output circuitry
- Audio/video switching
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