RADAR is a price search engine. We link to the original listing — we never sell direct. Transactions happen on the source site.
The Onkyo P-304 is a nicely regarded late-era preamp, and at US$499 it lands right around the current middle of the used market rather than looking like a steal or a stretch. Against your comparable data, it sits above the US$425 median but still under the US$499 75th percentile, so this reads as fair-to-strong pricing, not ambitious.
What makes it worth a look is the combination of solid phono performance, clean line-stage utility, and the fact that these late-’80s/early-’90s Onkyo Integra pieces tend to have real staying power when they’ve been cared for. If the listing is clean and fully functional, the appeal is in buying a respected, well-built preamp with some rarity and visual charm; at this price, I’d mainly want confidence on controls, switches, and overall servicing history.
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.
