Panasonic RS-864s/RD-7703 QUADRAPHONIC Stereo System - Includes 4 Spea– Shuga Records
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Kenwood KR-9940 4-Channel Quadraphonic Receiver - Professionally Clean – Audio-Exchange-RVA
popsike.com - ANTIQUE QUADRAPHONIC STEREO SYSTEM BY SANYO FROM 1973 - auction details
Sansui QR-4500 stereo/Quadraphonic receiver - electronics - by owner - sale - craigslist
VTG Pioneer QX-9900 Quadraphonic Stereo Receiver Discrete 4CH & Matrix - electronics - by owner - sale - craigslist
Vintage Pioneer QX-949 Quadraphonic 4 Channel Stereo Receiver | eBay
The Quadraphonic Story | zStereo
harman/kardon 800+ Home Stereo Quadraphonic Amplifier Receiver System
Fully Restored Marantz 4000 Quadraphonic/Stereo Preamp - Very Rare and Mint Condition | Reverb Finland
Akai AS-8100S Quadraphonic Stereo Receiver RARE!! W/ Accessories GREAT! | eBay
Panasonic Quadraphonic 8-Track player | Collectors Weekly
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Rare Pioneer QX-949A 4 Channel Quadrophonic / Stereo FM/AM Receiver | Reverb Greece
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Quadraphonic Discography "List of Quadraphonic Publications"
Sansui QRX-9001 Vintage Quadraphonic/Stereo Receiver Multi-Volt - Very Nice 😍 | BIG AZ SPEAKERS
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Sanyo DCX 2700 K 4 Channel Quadraphonic Stereo Receiver Amplifier Audi
