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At US$800, this is right on top of the median for recent comparable asks, so it reads as a fair price rather than a steal; the obvious alternative at this level is a newer, less iconic power amp, but those usually don’t bring the same cachet or build charisma. With the 25th percentile at US$750 and the 75th at US$900, the listing sits squarely in the normal zone, not ambitious.
That makes it appealing if the unit is clean, stable, and unmodified. The M-506RS is well-regarded for its muscular, controlled sound, strong meter presence, and classic Integra-era build, and it has enough enthusiast following that nice examples tend to hold value. If it’s original, quiet, and fully functional, this is a solid buy for someone who wants vintage Japanese muscle with real visual appeal.
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.
