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Unknown condition at US$420 puts this just under the US$425 25th percentile and below the US$444 median, so it reads as a solid buy rather than a bargain-bin steal. In the current used market, that is a fair-to-good asking price for a known quantity, especially if the amp is fully functional and cosmetically decent.
The 840A is well liked for its muscular drive, clean presentation, and plenty of current for real-world speakers, which makes it appealing if you want an integrated that still feels substantial. The real upside here is getting a respected, sturdy older amplifier without paying median money; just make sure the controls are quiet, both channels are healthy, and any remote or original packaging is included if those matter to you.
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.
