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Musical Fidelity X-PSU & X-10D Buffer (Valve) Hi all, Up for sale are Musical Fidelity X-PSU & X-10D combo, these quirky classic MF gears built like a tank, still in excellent condition and working as good as new. I bought these from another member 2 months ago to go with my solid state amp, but I just bought an intergrated tube amp so they're no longer required. Both the Musical Fidelity X-10D and the X-PSU comes supplied with the original OEM boxes, 1 x AC wallwart power supply, 4 x power link cables ( X-PSU ) and 1 x IEC power cable as shown in the photos. These X-series are highly collecta
# Musical Fidelity X-PSU & X-10D Buffer (Valve) – Buyer Notes
At AUD $500, this asking price sits comfortably in fair territory for a used X-PSU paired with an X-10D buffer. The X-PSU was Musical Fidelity's dedicated external power supply for their X series, typically commanding AUD $300–$600 on the secondhand market depending on condition; the X-10D valve buffer adds real value as a standalone preamp stage. New, these units would have cost significantly more, so you're looking at reasonable depreciation. Against comparable listings in your region (median AUD $419, ranging AUD $161–$1,230), this sits just above mid-market—justified if both pieces are clean and functional.
Before committing, verify the valve is original and still alive; replacements aren't trivial to source or swap. Check that the X-PSU powers up cleanly with no hum or oscillation, and confirm all RCA connectors are present and undamaged. Ask whether the original power cable and documentation come with it—these kits rarely include spares, and the X-PSU's proprietary connection matters. A quick listen test, if possible, will confirm the buffer stage isn't introducing noise.
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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