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Our Thoughts RADAR AI

At £996, this Musical Fidelity M6Si is a strong deal, sitting just below the 25th percentile of £982 and well under the median of £1,032 from 11 recent GBP listings. While the condition is listed as unknown, the price is aggressive enough to warrant a closer look if the unit is functional, as it represents genuine bargain territory compared to the typical used market.

This amplifier is well-regarded for its 220 watts per channel of power, transparent dynamics, and high versatility, including a quality onboard MM/MC phono stage and 24-bit/96kHz USB DAC. Its architecture as a preamp driving two independent monoblock sections offers the flexibility of future upgrades to separate power amps. At this price, even with unknown condition, the M6Si’s robust build and extensive features make it a compelling buying opportunity for an enthusiast seeking high-end sound without the new retail cost.

Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.

About Musical Fidelity

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.

See all Musical Fidelity listings on RADAR.

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