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$50.00
$50.00
Year: 1973
Size: 24 x 33 inches
This poster advertises the Japanese electronics manufacturer Sansui's QS Vario Matrix. "Sansui developed the QS Regular Matrix system, which made it possible to transmit four channel Quadraphonic sound from a standard LP. The channel separation was only 3 dB, but because of the human way of hearing it sounded relatively good. In 1973, Sansui introduced the more advanced QS Vario Matrix decoder with 20 dB separation." - Wikipedia