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Sansui QRX-5500

Four Channel Receiver (1973-74)

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Sansui QRX-5500


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

Weight: 21.6kg

Year: 1973


service manual   English -

instruction/owners manual   English - haddock621

panel information   English - haddock621

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QRX Receivers

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re: QRX-5500

Hi do you know where I can get the operation manual? im having a hard time trying to set up
the system, I found the service manual but I need is the operation manual, please help, thanks.

desousa11's picture

service manual (en)

Hi is there anyone able to help me with a service manual for the Sansui QRX 7500?
I would very much appreciate it. I am from Johannesburg. South Africa. I have been battling to get one. I have tried a few places on the internet, no one seems to have one.


Hi, i only have a schematic, its ok for you ? Nick.

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