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At £100, this Pioneer A-400 is a genuine bargain, sitting well below the 25th percentile of £155 and nearly 40% under the median of £172. The asking price is a strong deal compared to the typical used market of £155–£200 for this model.
The A-400 is a respected 1991 integrated amp that delivers clean, musical sound with ample headroom for most speakers, originally priced at £240–£290. Its straightforward design means fewer failure points than more complex units, and at this price, even unknown condition is a worthwhile risk for a fellow enthusiast hunting value. If it powers up cleanly, you’ve secured a beloved vintage amp at a price that’s hard to beat.
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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