Hitachi SR-804 (1978)
The Hitachi SR-804 is a receiver whose reputation rests almost entirely on one advertising push. There are no lab reports or long-term reviews behind it. Little is documented beyond its appearance in the US hi-fi press in the fall of 1978, and nearly everything known comes from Hitachi's own campaign.
The ads ran in High Fidelity (September 1978, p.141) and Audio (November 1978, p.73). They claimed the SR-804 was the world's most powerful 50-watt receiver. The claim hung on a Class G amp rated conservatively at 50 watts RMS per channel, 20-20,000 Hz into 8 ohms. On musical peaks it could instantly double its power to 100 watts to avoid clipping distortion. Hitachi used the campaign to position itself as the new leader in audio amplifier technology.
Known specs, such as they are:
- Stereo receiver with Class G amplifier
- 50 W RMS per channel, 20–20,000 Hz, into 8 ohms
- Peak power doubles to 100 W to prevent clipping
That is about all the record holds. No measured review, no manual scan, and no original pricing has surfaced in this archive yet. If you have an SR-804 or its paperwork, the file is open.
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