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Are you specifically after the M-508’s substantial power and vintage Grand Integra presentation? At USD 2,690, this is an ambitious ask: your nine-listing comparables place the median at USD 1,800 and the 75th percentile at USD 2,400. Unless it has unusually strong provenance, recent servicing, or exceptional cosmetic condition, there is room to negotiate.
The M-508 remains a serious performer, with a dual-mono design, roughly 200 watts per channel into 8 ohms, excellent headroom, and those distinctive meters. It can drive demanding speakers with authority while staying relatively composed under load. The concern is age rather than basic design: insist on a proper audition, quiet relays, stable meters, and evidence of capacitor or other service work. At this price, documented maintenance should be part of the deal.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Onkyo traces its roots to postwar Japan, founded in 1946 in Osaka by Takeshi Goda, an engineer at Matsushita Electric who envisioned high-quality Japanese loudspeakers. Initially established as Osaka Denki Onkyo K.K., the company began production in 1948 with the acclaimed ED-100 speaker featuring a 25 cm driver, quickly building a reputation through LP concerts and innovative designs that resonated with audiophiles.
The brand excels in premium home audio, renowned for AV receivers, hi-fi amplifiers, and surround sound speakers that deliver exceptional clarity and power. Its portfolio spans turntables, DACs, headphones, and cables, bolstered by acquisitions like Pioneer's home electronics division in 2015, enabling cutting-edge integrations such as internet radio and high-resolution streaming.
Onkyo holds a solid mid-tier position in the hi-fi market, prized by discerning buyers for reliable performance and value rather than ultra-high-end exotica. Despite bankruptcy challenges in the late 2010s, its revival under new ownership preserves a legacy of technological innovation and pure sound enjoyment, appealing to both vintage enthusiasts and modern home cinema setups.
See all Onkyo listings on RADAR.
