Stereo and Quadradial Receiver (1976-77)
The 4270 is a high quality stereo and quadradial 4-channel receiver developed by Marantz.
The unit incorporates Marantz’s exclusive Vari-matrix circuit which simulates 4-channel sound from normal 2-channel stereo programs, and is capable of reproducing 4-channel sound from any matrix encoded source.
The 4270 will also reproduce any discrete 4-channel program as well as regular stereo and monaural programs.
An optional plug-in decoder adapts the unit receiver for any specific matrix system such as Columbia’s SQ.
Tuning range: FM, MW
Power output: 25W/ch into 8Ω (quadraphonic)
Frequency response: 20Hz to 20kHz
Total harmonic distortion: 0.3%
Damping factor: 45
Input sensitivity: 2.2mV (MM), 150mV (line)
Speaker load impedance: 4Ω to 16Ω
Dimensions: 17-21/64 x 5-25/64 x 14-3/8 inches