Sansui QRX-6500

This Sansui QRX-6500 was one of Sansui’s early contributions to the quadraphonic genre. It was manufactured from 1973 until about 1975 and produced 33 watts per channel into 8 ohms when all four channels are …

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Sansui QRX-7500

In the early to mid 1970’s Quadraphonic sound was just coming to the forefront. Sansui was one of the leaders of the 4-channel movement with their QR line of quadraphonic receivers. Around 1974-1975 they introduced …

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Marantz 4240

The Marantz 4240 is one of their Quadraphonic offerings in the 4xxx series. The Model 4240 is a high quality stereo + quadradial receiver and incorporates Marantz’s exclusive Vari-matrix circuit which simulates 4-channel sound from …

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Marantz 4400

The Marantz 4400 is a classic quadraphonic 4 channel receiver into which Marantz pretty much threw everything they had. Offered from about 1974 until 1978, it pushed out 125 watts RMS per channel into 8 …

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Pioneer QX-949

The Pioneer QX-949 is one of Pioneer’s larger quadraphonic receivers and was top of the line when it was introduced in 1974. This was mainly due to the fact that it had essentially all the …

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Sansui QRX-5500

This Sansui QRX-550 is one of Sansui’s Quadrophonic offerings. It puts out 30 per channel to four channels into 8ohms.  It is part of the early beginnings of surround sound. I believe Sansui had six …

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Pioneer QX-9900

This is one of Pioneer’s four channel offerings – the Pioneer QX-9900. The QX-9900 was manufactured in the mid 70’s and featured both Matrix and SQ decoding. It’s rated at 38 watts per channel into …

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Sansui QRX-9001

This is one of the more dominant quadraphonic receivers ever made – the Sansui QRX-9001. It’s definitely comparable to the Marantz 4400.  It put out 60 watts per channel in to 4 channels and 120 …

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Pioneer QX-8000 Quad

Here is one of Pioneer’s classic Quad’s, or 4 channel, offerings the Pioneer QX-8000. The QX-8000 supplied 20 watts per channel into four channels at 8 ohms. It weighs just over 34 pounds. It also …

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Marantz 4270 Quad

This is the Marantz 4270 Quadraphonic 4 channel receiver or Quadradial as they called it. It of course would also play in 2 channel stereo. It was one of Marantz’s top of the line quad …

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