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My Krell S550I for salernrnSuperb condition and superb sound. Original box and accessories all present.
Are you getting a properly sorted heavyweight integrated for a genuinely sensible price? At £1,750, this looks fair to strong rather than cheap: the S550i was a £5,000–£7,995 amplifier new, and recent used examples cluster around roughly £1,150–£2,100 once converted to GBP, so this asking price sits comfortably in the market rather than above it.
That still makes it a worthwhile buy because the S550i is one of Krell’s more admired all-in-one amps: huge current delivery, very authoritative bass, and the sort of effortless control that suits demanding speakers. In excellent condition, the real upside is getting flagship-level Krell muscle without needing separates; just confirm it’s fully working, has the correct remote and packing, and ideally some service history, since older high-power integrateds are best bought with provenance.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Krell Industries, founded in 1980 in the United States by Dan D'Agostino and his wife Rondi, emerged from a passion for pushing audio engineering boundaries. Based initially in Bridgeport, Connecticut, and later settling in nearby Orange, the brand drew its name from the advanced alien race in the 1956 film Forbidden Planet, symbolizing limitless technological power. The company's debut at the 1981 Consumer Electronics Show with the KSA-100, a high-power Class A amplifier, sparked immediate demand and established Krell as a force in American hi-fi innovation.
Krell specializes in high-end amplification, with its power amplifiers—epitomized by flagships like the Master Reference Amplifier—earning legendary status for their raw dynamics and precision. The lineup extends to preamplifiers, surround sound processors, digital-to-analog converters, CD and Super Audio CD players, loudspeakers, and subwoofers, all engineered for uncompromised performance in music and home theater systems.
Positioned firmly at the pinnacle of the high-end audio market, Krell commands respect among discerning audiophiles for its cutting-edge circuitry, massive power supplies, and relentless pursuit of sonic excellence. A top-tier brand alongside legends like Levinson and Threshold, it appeals to buyers seeking reference-level gear that defines the genre, even amid recent ownership transitions following Rondi's passing in 2024.
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