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Condition being unknown, £1,150 lands in fair-to-strong territory rather than feeling like a steal, but it’s still broadly in line with what this model can command when clean and complete. The C-90a was a high-end late-’80s control amplifier, and used examples of the C-90/C-90a family commonly show up around the mid-hundreds to low-thousands of pounds once converted from overseas asking prices and auction results, so this is not an outlier asking price.
What makes it worth considering is the scale of the build and the feature set: this is a serious, well-regarded preamp with proper phono support, flexible switching, and the sort of robust Pioneer engineering that still appeals to vintage hi-fi buyers. If it’s original, tidy, and fully working, the upside is in getting a top-tier Pioneer control amp with real collector appeal; at this price, though, I’d want clear proof of service history, quiet operation, and any included remote/manual before paying full ask.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Pioneer traces its roots to 1937 in Tokyo, Japan, when founder Nozomu Matsumoto, inspired by the thrill of imported hi-fi speakers, developed the A-8 dynamic speaker and launched a radio and speaker repair shop. The business formalized as Fukuin Shokai Denki Seisakusho in 1938, evolving into Pioneer Corporation and embodying Matsumoto's philosophy of "Move the Heart and Touch the Soul" through audio innovation.
The brand excels across diverse hi-fi categories, pioneering Japan's first headphones in 1960 with the SE-1 and the world's first component-based stereo system in 1965 via the PSC-5A. Pioneer's portfolio spans amplifiers, speakers, turntables, and DACs, alongside landmark car audio advancements like the 1975 Supertuner-equipped stereo and the 1986 in-car CD player, blending home and automotive excellence.
Today, Pioneer holds a commanding mid-to-high-tier position in the market, revered for reliable, performance-driven gear that balances premium quality with accessibility. Its vintage components attract collectors, while current offerings appeal to discerning buyers seeking robust, innovative sound reproduction without boutique excess.
See all Pioneer listings on RADAR.
