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A fair, on-market ask for a well-liked integrated amp. At £90, this sits right on the £90 median and exactly at the £90 25th percentile, so it’s not a steal in pure price terms, but it is priced sensibly for the current used market and doesn’t feel ambitious.
What makes it worth a look is the 640A’s reputation for clean, punchy, musically easygoing sound and solid day-to-day usability; it’s the sort of older Cambridge unit that can still make a good system sing. If it’s genuinely tidy and working properly, the upside is getting a respected amp at a sensible entry price, with the usual age-related checks on switches, pots, and service history being the main things to confirm.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Cambridge Audio emerged from the innovative spirit of 1960s Britain, founded in Cambridge, United Kingdom, by a group of young engineers who spun off from Cambridge Consulting Group. Established in 1968, the brand launched with the groundbreaking P40 integrated amplifier—the first to employ a toroidal transformer, setting a new standard for dynamic power delivery in hi-fi design that endures in high-end gear today. This heritage of British engineering excellence propelled decades of award-winning products, navigating ownership changes including a revival under entrepreneur Vince Adams and acquisition in 1994 by Julian Richer and James Johnson-Flint of Richer Sounds.
The brand excels across core hi-fi categories, renowned for integrated amplifiers like the iconic A1 and P-series, alongside streaming DACs, network players, turntables, and all-in-one systems that prioritize pure analogue warmth and digital precision. Speakers, headphones, and cables round out a cohesive ecosystem, emphasizing accessible high performance without excess frills.
Positioned firmly in the mid-tier market, Cambridge Audio delivers premium British sound—detailed, rhythmic, and uncolored—at prices that democratize quality for discerning buyers. Free from corporate bloat, it holds a reputation for reliability and value, appealing to enthusiasts seeking sophisticated hi-fi that punches above its weight rather than chasing ultra-high-end esoterica.
See all Cambridge Audio listings on RADAR.
