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At £2,450, this Musical Fidelity M6 500i is ambitiously priced compared to the typical used market, sitting well above the £2,210 75th percentile anchor from our database. You are paying a premium here over the £1,954 median, whereas competitors at this price point often offer more modern features or higher wattage per pound.
However, if the unit is pristine, this remains a compelling buy for the sheer power and dual-mono architecture it delivers. The M6 500i is legendary for its 500Wpc output into 8 ohms and remarkably low distortion, offering a dynamic, window-rattling performance that rivals much more expensive amplifiers. Its genuine dual-mono design with separate transformers and heat sinks provides a solidness and clarity that standard integrateds struggle to match. For a serious enthusiast with power-hungry speakers, this is a rare opportunity to secure a heavyweight classic, provided the condition is confirmed excellent given the price.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Musical Fidelity, a British hi-fi icon, traces its roots to 1982 when clarinettist and audio enthusiast Antony Michaelson founded the company in London. Disillusioned with the sound quality of existing gear after his stint at predecessor Michaelson & Austin, he handcrafted his debut product—a minimalist preamplifier dubbed "The Preamp"—on his kitchen table. Paired with the quirky Dr. Thomas power amplifier, these designs disrupted the market with their bold aesthetics and sonic punch, establishing Michaelson’s experimental ethos from the outset.
The brand has long centered on amplifiers as its cornerstone, spanning integrated, power, phono, headphone, and preamp models renowned for Class-AB topology and innovative touches like Nuvistor tubes. It expanded into streaming players, DACs, CD players, Bluetooth receivers, all-in-one systems, and even headphones and turntables, always prioritizing musicality over convention. Unconventional industrial designs, from curved heatsinks to sculptural panels, became signatures, influencing competitors.
Positioned firmly in the high-end arena, Musical Fidelity commands respect among discerning audiophiles for its value-driven performance and soulful sound. Iconic models like the A1 and F-series endure as collector favorites, blending accessibility with premium engineering. Acquired by Austria’s Audio Tuning in 2018, it continues evolving under new stewardship while honoring its heritage as a boutique force in British hi-fi.
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