MARANTZ 4140 RARE Stereo Quadradial Amplifier 140 WRMS Vintage 1977 Good Look WORK PERFECT Marantz 4140 Stereo 2 and Quadradial 4 Console Amplifier (1977) specifications Power output: 70W/ch into 8Ω (stereo), 25W/ch into 8Ω (quadraphonic) Frequency response: 20Hz to 20kHz Total harmonic distortion: 0.3% Damping factor: 40 Input sensitivity: 2mV (MM), 150mV (line) Dimensions: 15-3/8 x 5-3/4 x 14-3/8 inches Weight: 33lbs.
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