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This Onkyo M-5140 at US$352 is ambitious, sitting well above the 75th percentile of US$312 and noticeably higher than the median of US$242 from your database, making it a tough sell unless the condition is pristine. While one external listing shows US$175, your ground truth of four comparables is the stronger anchor, and US$352 clearly exceeds that market range.
The M-5140 is a respected vintage solid-state amp known for clean, straightforward power and reliable performance in the 70s–80s Onkyo line, often paired with classic receivers. If this unit is original-owner, fully tested, and includes the original rack or manual, the price might justify the premium for a collector seeking a clean example. Otherwise, wait for a listing closer to US$240–US$280.
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.
