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Marantz 4240

Stereo/Quadradial 4 AM/FM Receiver (1976-77)

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Marantz 4240


The Marantz Model 4240 is a high quality stereo + quadradial receiver developed by Marantz, a name famous for quality in the audio component industry.

The model 4240 incorporates Marantz's exclusive Vari-matrix circuit which simulates 4-channel sound from normal 2-channel stereo programs, and is capable or reproducing 4-channel sound from any matrix encoded source.

The 4240 will also reproduce any discrete 4-channel program as well as regular stereo and monaural programs.

An optional plug-in decoder adapts the 4240 for any specific matrix system such as Columbias SQ.


Tuning range: FM, MW

Power output: 40W/ch (stereo), 17W/ch into 4Ω (quadraphonic)

Frequency response: 20Hz to 20kHz

Total harmonic distortion: 0.5%

Damping factor: 20

Input sensitivity: 2.2mV (MM), 150mV (line)

Signal to noise ratio: 93dB (MM)

Speaker load impedance: 4Ω to 16Ω

Dimensions: 440 x 137 x 365mm

Weight: 15.5kg


instruction/owners manual   English -

schematics   English -

service manual   English -

M-4240-A service bulletin   English - LaFOOTE

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re: 4240

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