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At US$199, this Onkyo M-501 is a clear bargain compared to the obvious alternative of hunting for a similar 150W stereo amp at this price point, landing just under the US$185 25th percentile of your own database and well below the US$200 median. While external bluebook data suggests a higher average around US$522, your grounded comparable listings confirm US$199 is a strong deal, sitting in the bottom quartile of recent asking prices.
The M-501 is a respected, heavy-duty 2-channel power amp delivering 150W per channel with impressive 0.09% distortion and a 100dB signal-to-noise ratio, making it a reliable driver for demanding speakers. Its 10.5kg build and wide 5Hz–100kHz frequency response reflect serious analog engineering from its era. With no condition flags and a price that rewards patience, this is a genuine buying opportunity for an enthusiast seeking clean, high-current power without the premium.
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.
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