4-Channel Decoder / 2 Channel Rear Amplifier (1973)
The QS-800A is a combination of Sansui's new QS matrix system 4-channel decoder and a high performance 200 watt stereo amplifier to amplify the rear channel signals for 4-channel sound reproduction.
The decoder features the exclusive QS Vario-Matrix circuitry which provides optimum separation among the reproduced sounds.
When added to a present stereo system, this decoder and the rear channel amplifier will work together to (1) decode encoded 4-channel program sources back into 4-channel, and (2) transform (synthesize) conventional 2-channel sources into 4-channel.
The QS-800A as a whole also offers complete provisions for reproducing discrete 4-channel program sources and for reproducing 2-channel sources in 2-channel stereo if you so desire.
As such, it is the most complete, most authentic means of upgrading your stereo system to immediate 4-channel status.
Power output: 45W/ch into 8Ω (stereo)
Frequency response: 20Hz to 30kHz
Total harmonic distortion: 0.5%
Damping factor: 200
Input sensitivity: 150mV (line)
Signal to noise ratio: 80dB (line)
Output: 150mV (line), 30mV (DIN), 0.8V (Pre out)
Speaker load impedance: 4Ω to 16Ω
Semiconductors: 61 x transistors, 2 x FET, 39 x diodes, 1 x zener diode
Dimensions: 147 x 462 x 335mm
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