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This is a strong deal at £720. Against six recent comparable asking prices, it sits well below the £895 median and above the £220 25th percentile, so it is comfortably toward the bargain end rather than merely fair.
The M-90 is a seriously capable vintage power amplifier: a dual-mono design rated at 200 watts per channel, with substantial current delivery and the authority to drive difficult speakers. Its build, distinctive styling and rarity make it desirable, while the price leaves useful headroom for sensible servicing. As an older, powerful amplifier, insist on a proper demonstration of both channels, clean relay engagement, working meters and absence of hum or distortion; evidence of recent service would make this already attractive ask especially compelling.
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.
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