Sansui QRX 3500 receiver. Fully renovation. Classic Vintage.
Sansui Electric Co., Ltd. was founded in 1947 as a manufacturer of transformers, but already in the 1960s it gained a reputation as a serious producer of audio components. Despite its huge popularity (especially in the United States) in the 60s and 70s, after 1985 the company began to bring much less profits than its rivals (Sony, Pioneer or Technics). It was the end of the heyday of hi-end equipment, which was related to an increase in sales of personal computers. At that time, Sansui Electric Co., Ltd. focused on the production of high-end components in Japan, and also started to produce high quality TV sets and other video equipment, while stopping exports. At the end of the 90s, the brand name was used on video devices manufactured by other companies.
Eventually, Sansui Electric Co., Ltd. as part of Grande Holdings went bankrupt in 2014. It is worth noting that Sansui was the first company to use transformers in audio equipment, and first to introduce to the market a high-voltage tube-transistor (hybrid) amplifier and a QS / RM system (Quadrasonic System / Regular Matrix), which allowed to obtain four-channel sound from two-channel one.
Sansui products already in the 60s were world-famous for their great quality of sound engineering, great design and the highest performance. This was possible mainly because each model was created from start to finish by Sansui experts. Only the best parts were used in production to ensure uniform and highest quality, and each device was repeatedly checked with the most accurate measuring instruments before it reached the customer. Thanks to this approach, Sansui Solid State receivers were characterized by low interference parameters, higher damping factors, greater dynamics, and above all, much better sensitivity and selectivity.
The QRX-3500 was created as a flagship model of a new generation of high quality quadraphonic stereo amplifiers from Sansui. Thanks to its distinctive design and excellent performance parameters it has won recognition among a wide range of customers, including professionals. It is worth noting that this 4-channel amplifier was equipped with the then newly developed QS Vario-Matrix and the famous QS synthesizer. These developments make the QRX-3500 impressive even today, with its wonderful, warm sound and a very rich soundstage allowing the listener to enjoy every detail of every song.
The enclosure has been cleaned of old coatings. The wood finishing is Chinese oil produced from natural oils and natural turpentine-based beeswax. The wood is extremely nice to the touch. Potentiometers are in perfect condition. Back elements of the enclosure were cleaned and painted using the automotive wet painting technique. The device has been fully reviewed and serviced.
New green-blue illumination of the front panel.
Collector’s item. The device is in perfect condition.
– power – 2 x 22W at 8Ohm, quadraphonic, stereo
– FM range 88-108 MHz, doesn’t require re-tuning
– frequency response – 30Hz – 30kHz
– total harmonic distortion – 0.5%
– signal-to-noise ratio – 75dB (line)
– weight – 19 kg
– impedance 4 – 16 Ohm
– channel separation – 45 dB (line)
– damping factor – 30
– dimensions – 52.5cm x 20cm x 37cm (width x height x depth)
– year of production: 1973/74
– made in Japan