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Extremely rare opportunity to own a matched stereo pair of Pilot AA-908 monoblock amplifiers. These are seldom seen individually, and finding a fully functioning pair is exceptionally uncommon.Both units have been serviced and are operating quietly and reliably. Work includes replacement of electrolytic capacitors, out-of-spec resistors, and updated power cables.A matched quad of JJ EL34 tubes has been installed and the amplifiers have been properly balanced. Original Amperex brown base tubes are included (tested but weak).These sound outstanding — rich, detailed, and powerful, exactly what you’d expect from classic EL34 mono blocks.These ship fully insured and packaged with care.This is a vintage electronic unit and has been serviced for functionality, but due to age may require additional maintenance or adjustment depending on use and system matching.Unit was tested and functions as described at time of sale.Tube electronics can exhibit minor noise, microphonics, or variability depending on tubes and environment.
At US$2,450, this is well into ambitious territory versus the recent used market: the median is US$159, and even the 75th percentile is only US$329, so the asking price is a major premium unless the listing includes serious restoration, rare documentation, or exceptional provenance.
That said, EL34 monoblocks from this era can be very rewarding when properly serviced: they usually deliver a sweet, lively midrange, strong dynamics, and enough tube-amp charm to justify collecting interest. The value here depends on the quality of the service work, matching between the pair, and whether the cosmetically original chassis, transformers, and any test records are all present; without that, this is a passion purchase rather than a market-value buy.
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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