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The Onkyo Integra P-306RS is a premium, vintage stereo preamplifier renowned for its exceptional analog performance and audiophile-grade construction.SpecificationsFrequency response: 0.8Hz to 170kHzTotal harmonic distortion: 0.0015%Input sensitivity: 0.13mV (MC), 2.5mV (MM), 150mV (line)Signal to noise ratio: 83dB (MC), 92dB (MM), 103dB (line)Output: 1V (Pre out)Semiconductors: 48 x transistors, 37 x diodes, 6 x FET, 4 x ICDimensions: 480 x 100 x 403mmWeight: 10.5kgLocal pick up / inspection / purchase available at Archer High Fidelity in Falls Church, VA. We are a vintage sales and service specialist covering the Washington DC metro area.All major credit cards accepted, as well as PayPal, check on clearing, and Venmo.Any other questions, please feel free to ask.
US$350 is a strong deal on this one: it sits right at the 25th percentile of recent comps and well below the US$500 median, so you’re buying at the low end of the current market rather than paying up.
That makes it easy to recommend if the unit is clean and fully functional. The P-306RS is a respected vintage preamp for its straightforward, musical line-level performance and solid build, and at this price the upside is mainly in getting a good-sounding control center without stretching budget. I’d still want to confirm all switches, pots, and input selectors are quiet and that it’s complete enough for your setup, but at US$350 the listing already has the shape of a buy.
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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