06 February 2016

Quadraphonic - Surround Sound Amplifiers


Quadraphonic is a forgotten Surround Sound system from the early 1970s.
This system used four channels with speakers positioned at the four corners of the listening room. It was never a huge success because of the expensive equipment, conflicting formats and available albums. True, four separate channels, were used in the UD-4, CD-4, Quad-08 and Q4 systems. A different approach was the encoded system where the four channels were converted (encoded) in two channels (usually a vinyl LP) These records were decoded with a decoder in four channels. Some of the formats were the Matrix H, EV-4, and the completely different SQ and QS.

Here are some examples of quadraphonic amplifiers and decoders made in the early 1970s.

AKAI AS-980 quadro receiver (SQ, RM, CD-4)
AKAI GX-280D SS 4-channel tape deck (1973)
akai quadro

BLAUPUNKT Delta 6011 V quadro receiver (SQ-decoder) (1974)
blaupunkt quadro

Victor (JVC) Ssystem 105 - stereo / quadro components
jvc quadro

JVC 4VR-5456X quadro receiver (1977)
JVC MCA-V9 quadro amplifier
jvc quadro

Victor (JVC) MCA-V9 quadro amplifier
JVC 4VR-5426X quadro reeceiver (CD-4) (1977)
jvc quadro

JVC 4VN-990 quadro amplifier (SQ Matrix) (1977)
JVC JA-X9 quadro amplifier (CD-4, Matrix) (1977)
jvc quadro

LOEWE QR 320 quadro receiver (1975)
LOEWE QV 300, QV 310 quadro amplifier
loewe quadro

marantz Model 4400 quadro receiver (1973)
marantz Model 4060 quadro aplifier, Model 4415 quadro receiver
marantz quadro

PIONEER QC-80 QM-80 and QA-80 quadro amplifiers (1971)
PIONEER quadro system
pioneer quadro

PIONEER QX-8000, QL-600, QT-6600, QC-800A, QM-800A, 
QA-800A, QL-800A, QD-240 quadro components
pioneer quadro

PIONEER QL-60 quadro amplifier
PIONEER QX-80 quadro receiver
pioneer quadro
Sansui QRX-3000, QRX-3500 quadro receivers (SQ Matrix) (1973)
sansui quadro

Sansui QS-1, QS-100 quadro amplifiers
sansui quadro

SONY SQD-2020 quadro decoder (SQ Matrix)
SONY SQR-6650 quadro receiver
SONY SQA-200 quadro decoder (SQ Matrix)
sony quadro

SONY SQD-2020 quadro decoder (SQ Matrix) (1973)
sony quadro

SABA HiFi-Studio 8200 quadro receiver (1974)
SABA HiFi-Studio 8280 quadro receiver (1975)
saba quadro

TELEFUNKEN TRX 2000 hifi qudro receiver (1978)
KENWOOD KR-8340 quadro receiver (1973)
telefunken kenwood quadro

NORDMENDE Quadronado QXL-160 quadro receiver (SQ, CD-4) (1974)
YAMAHA quadro system
nordmende yamaha quadro

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