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