Akai R-40
One period magazine review mentions the Akai R-40. Studio Sound (October 1966, p.43) lists a frequency response of 30 Hz to 18,000 Hz ±1 dB at 15 ips. Beyond that, the model name appears in no period catalogs, service manuals, magazine reviews, or even passing mentions within the VTA research archive. That is a very unusual gap for a brand as widely covered as Akai. The R-40 may have been a very short-run product or a regional variant that escaped the usual record, but no evidence has surfaced to confirm even its product category (audio component? tape deck? speaker?).
If you own an Akai R-40, or have seen documentation, catalog pages, or an advertisement that includes it, please send details to the Archive. Any genuine fact - a photograph, a spec sheet, a date code - would help narrow down what this model is.
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