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Offered is „Higher Fidelity Model 138 Monoendstufen“ by Higher Fidelity as second-hand device from the category „Power Amplifier“ on audio-markt.de - the online market place for high-end. The advert with the number 9179779281 ends on 26.12.2026 at 06:23 o'clock.
This Fidelity Research Model 138 mono block is a revered, high-current Japanese design known for its massive power reserves and lush, organic midrange, but the €2,900 asking price is significantly ambitious. Based on 53 recent comparable EUR listings, the median sits at €998 with a 75th percentile of €1,398, meaning this listing is more than double the upper quartile and nearly triple the median. While the Model 138 (often associated with the discontinued F-138 lineage) is a cult favorite for its ability to drive difficult speakers with authority, paying nearly €3,000 requires the unit to be in pristine, original-owner condition with all accessories to justify such a steep premium over the typical market.
The potential upside lies in the rarity of these mono blocks in good condition, as they offer a distinct, powerful sound that many enthusiasts chase for classical and jazz. However, at this price point, buyers must verify the condition rigorously, as age-related issues like worn output tubes or capacitor drift are common in vintage Japanese amps and could quickly erode the value. Unless the seller provides proof of recent servicing and includes original manuals or boxes, the price feels disconnected from the current market reality, making this a risky buy for anyone expecting fair value compared to the €510–€1,398 typical range.
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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