Four Channel Receiver (1972-73)
The Sansui QR-1500 4-channel receiver incorporates Sansui's unique synthesizing/decoding matrix (patents pending) that produces a multi-dimensional sound field so enthusiastically received by many audio experts as purely revolutionary.
An instrument that literally heralds the new age of 4-channel stereo sound reproduction, the QR-1500 not only converts ordinary 2-channel stereo discs, tapes and FM broadcasts into immensely richer 4-channel stereo sound, but, working in the capacity of a decoder, restores any 2-channel material encoded from four channels to its original full-fledged 4-channel status.
It also incorporates the four all-silicon amplifiers which enable you to use a 4-channel tape machine to reproduce discrete 4-channel stereo.
Tuning range: FM, MW
Power output: 15W/ch into 8Ω (quadraphonic)
Frequency response: 30Hz to 30kHz
Total harmonic distortion: 0.8%
Damping factor: 20
Input sensitivity: 3mV (MM), 180mV (DIN), 180mV (line)
Signal to noise ratio: 60dB (MM), 70dB (line)
Channel separation: 50dB (line)
Output: 180mV (line), 30mV (DIN)
Speaker load impedance: 4Ω to 16Ω
Semiconductors: 1 x FET, 1 x IC, 57 x transistors, 24 x diodes
Dimensions: 480 x 132 x 310mm
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