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This £152 asking price for the Fidelity Research HPA-100 is a solidly fair deal, sitting comfortably near the median of £106 from 110 recent GBP listings. It is well above the 25th percentile of £52, indicating it is not a bargain, but it remains significantly below the 75th percentile of £294, so it is not ambitious either. The price reflects a realistic market value for a used unit of this well-regarded amplifier.
The HPA-100 is prized for its dual-mono, solidly handmade design that delivers balanced, weighty, and detailed sound with high-frequency refinement. Its meaningful upside lies in its rarity as a sought-after Japanese headphone amp and the potential for original-owner condition if the listing is clean. At this fair price, it represents a genuine buying opportunity for enthusiasts seeking a refined, low-distortion amplifier without the premium cost of newer models.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Fidelity Research emerged from Tokyo in 1964, founded by Isamu Ikeda amid Japan's postwar audio boom. The company quickly established itself as a precision engineering powerhouse, focusing on analog playback components during the golden age of vinyl. Operating until around 1984, it embodied the meticulous craftsmanship that defined high-end Japanese hi-fi, with designs that prioritized sonic purity and mechanical innovation.
The brand specialized in moving-coil (MC) phono cartridges and tonearms, earning acclaim for models like the MC-202 cartridge and the iconic FR-64 and FR-66 series. These products featured advanced materials such as stainless steel and specialized alloys, delivering exceptional tracking, detail retrieval, and dynamics. While not venturing into amplifiers, speakers, or digital gear like DACs, Fidelity Research honed a narrow but masterful niche in turntable essentials.
Today, Fidelity Research holds vintage-collector status among discerning audiophiles, revered for its high-end analog prowess. Once priced at premiums like $495 for top tonearms, its gear commands cult following in the used market, prized for timeless transparency and build quality that rivals modern boutique offerings. For vinyl enthusiasts seeking uncompromised heritage, it remains a benchmark.
See all Fidelity Research listings on RADAR.
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