Four Channel Receiver (1973-74)
Uncompromising quality is the key factor in the design concept of the QRX-5500.
It's a full-fledged 4-channel stereo home control center with all the advantages of the very latest electronic technology in the form of its all-stage direct-coupled OCL pure complementary power amplifier.
What's more, it offers excellent performance, high fidelity performance of the highest standards, and Sansui reliability.
Sansurs revolutionary 4-channel audio developments, as exemplified by the QS regular matrix system with QS vario-matrix and the famed QS Synthesizer, is combined in this powerful 220-watt 4-channel amplifier and sensitive FM/AM stereo tuner to enable you to enjoy any and all stereo and 4-channel program sources in realistic 4-channel reproduction.
As in all models of the new Sansui QRX series, the basic secret of the QRX-5500 is its QS 4-channel Synthesizer and Decoder section, a team of circuits which together make up the new Sansui QS regular matrix decoder with QS vario-matrix.
The Synthesizer/ Decoder Control on the right-hand side of the front panel enables you to select any one of five different 4-channel reproduction modes, including Phase Matrix for decoding SQ encoded records.
There's also the extra excitement of hearing your favorite 2-channel music sources transformed into authentic 4-channel sound by the Sansui QS Synthesizer, now greatly enhanced thanks to the OS vario-matrix technique.
This, with the built-in discrete 4-channel tape and auxiliary input circuits adds up to full versatility in all 4-channel formats.
Tuning range: FM, MW
Power output: 22W/ch into 8Ω (quadraphonic)
Frequency response: 30Hz to 30kHz
Total harmonic distortion: 0.3%
Damping factor: 40
Input 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 16Ω
Semiconductors: 136 x transistors, 5 x FET, 80 x diodes, 6 x zener diodes, 3 x IC
Dimensions: 203 x 594 x 370mm
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