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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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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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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