Aiwa CS 90X
Documentation on the Aiwa CS 90X is thin. What exists comes mostly from scattered resale listings and forum posts, not official literature. It was a stereo radio cassette recorder - a boombox - with an FM/AM tuner and a built-in phono preamplifier (RIAA stage). Most of its peers didn't have the phono stage. One Vietnamese seller noted the FM band pulled in stations clearly up to 108.2 MHz, and described the unit as having two speakers with full cassette, line-in, and line-out functions.
Production dating is uncertain. A Pinterest pin dates the CS-90X to November 1979, while a Russian seller places it in the early 1980s, roughly 1982-84. The two don't agree, so the exact years are unconfirmed. The unit runs on 110V and includes a 12V port.
What little reception commentary exists is enthusiastic. One Russian seller called it a beloved, rare, and wonderfully sounding boombox. A forum poster ranked it fifth in a personal sound-quality comparison of top boomboxes, ahead of a Sanyo MR-V8S and behind a Sony CFS-9000. A Vietnamese YouTube title likewise praised its sound quality. Current resale prices seen: about 51,090₽ on one Russian listing, and a Yahoo Auctions Japan sale of a used unit in present condition.
Known specifications, such as they are:
- Stereo FM/AM tuner with phono preamplifier (RIAA stage)
- Two speakers
- Cassette, line-in, and line-out functions
- 110V power, 12V port
- Width approximately 383 mm
No power output, frequency response, speaker driver size, weight, or original price has surfaced. The CS-90X appears in parts listings alongside the Aiwa CS-660, TPR-968, TPR-990, CS-75X, and CS-85X, but no formal family relationship is documented.
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