Nakamichi SR-40 (1980–1982)
The Nakamichi SR-40 is a component that suffers from a persistent identity crisis in online databases — some list it as an amplifier, others as a tuner. The weight of evidence, however, is clear: the SR-40 was a tuner with a built-in stereo tape monitoring facility, part of Nakamichi's 400/500-series of separates from the early 1980s.
The most useful description comes from hifiengine.com, which calls it a "Stereo Tape Monitor System" and notes that it was conceptually based on the Nakamichi 430, adding source/tape switching for tape monitoring duties. RadioMuseum concurs, describing it as a tuner unit for use with a separate amplifier. A 1988 issue of HiFI-Stereo (August 1988, p.100) references the model in a mail-order context, confirming it was still circulating in the trade several years after production.
Physically, the SR-40 was a standard-width component — 460 mm wide, 96 mm high, 300 mm deep, weighing 5.8 kg — with a metallic case and multi-voltage AC operation (110/120/220/240 V, 50/60 Hz). It received AM and FM (including FM-stereo) via a superheterodyne circuit, and required external main amplifiers for loudspeaker connection.
The production window is reasonably well established: RadioMuseum and classic-audio.com both give 1980–1982, and hifiengine states the SR-40 was introduced in 1980. One source claims 1979–1980 and labels the unit an amplifier with 36W per channel output, but those figures appear nowhere else and are almost certainly a case of model confusion with a different Nakamichi product. Treat them as suspect.
What's genuinely missing: no tuner performance specs (sensitivity, selectivity, stereo separation) have surfaced, and no original retail price is recorded. The tape monitor circuit details also remain undocumented. It's a modest, functional component from Nakamichi's separates era — a tuner that also solved the tape-monitoring problem — and that's about all the record confidently supports.
- AM/FM tuner, FM-stereo, superheterodyne design
- Stereo tape monitoring with source/tape switching
- Dimensions: 460 × 96 × 300 mm (W×H×D); weight 5.8 kg
- AC 110/120/220/240 V, 50/60 Hz
- Part of Nakamichi 400/500-series; conceptually based on Nakamichi 430
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