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Big and heavy Gorgeous Vintage Sansui QRX-5500 4- Channel Quadraphonic / Stereo Receiver Amplifier with very good Phono Stage in excellent working and good cosmetic condition for its age, works, looks and sound Great.Unit was recently, serviced, and all controls were cleaned with DeoxIT.Comes with User's Manual, Service Manual and Panel Information sheet on CD-R.Specifications:Tuning range: FM, MWContinuous RMS Power output: 25 Watt per channel x 4 into 8Ω (quadraphonic)Music Power (IHF) 220 Watt into 4Ω160 Watt into 8ΩFrequency response: 30Hz to 30kHzTotal harmonic distortion: 0.3%Damping factor: 40Input sensitivity: 2.5mV (mic), 2.5mV (MM), 100mV (DIN), 100mV (line)Signal to noise ratio: 70dB (MM), 80dB (line)Output: 100mV (line), 30mV (DIN)Speaker load impedance: 4Ω to 16ΩDimensions: 203 x 594 x 370mmWeight: 21.6kgYear: 1973
This is a fair ask, landing a bit under the US$973 median and well above the US$651 25th percentile, so it does not read as a bargain but it is solidly in range for a desirable vintage piece. At US$850, the seller is asking something close to the middle of the market rather than pushing the top end.
What makes it worth a look is the QRX5500’s reputation as a capable quad-era Sansui with real collector appeal and a strong following among people who like period-correct, discrete-logic gear with character. If the unit is clean and fully working, the upside is in the sound and the scarcity of decent survivors; just verify channel operation, all four outputs, and the usual age-related service history before buying.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Sansui, a pioneering Japanese audio brand, traces its origins to 1947 when it was founded in Tokyo by brothers Sakurai and Shunichi Yamamoto. Emerging from post-war Japan, the company quickly established itself as an innovator in consumer electronics, leveraging precision engineering to craft components that rivaled Western counterparts. Its heritage is rooted in the golden era of hi-fi, where Sansui's commitment to sonic purity helped define Japan's rise as a global audio powerhouse.
The brand excelled in a broad spectrum of hi-fi categories, with particular renown for its integrated amplifiers, receivers, and tuners that delivered warm, dynamic sound. Sansui also produced acclaimed speakers, turntables, cassette decks, and later digital converters, emphasizing robust build quality and innovative features like direct-coupled circuitry for low distortion. These products catered to audiophiles seeking balanced performance across analog and early digital domains.
Today, Sansui holds a cherished position in the vintage collector market, revered for its mid-to-high-end gear from the 1970s and 1980s—icons like the AU-series amps remain sought after for their musicality and reliability. While no longer a frontline manufacturer, its legacy endures among discerning buyers restoring classics or hunting timeless performers, blending nostalgia with enduring value.
See all Sansui listings on RADAR.
