Marantz 4140. Marantz 4140 Quadradial Integrated Amplifier Fully Restored Photo The power bandwidth is from 7hz to 70 khz, and only has an IM (Intermodulation Distortion) and Total Harmonic. Power output: 70W/ch into 8Ω (stereo), 25W/ch into 8Ω (quadraphonic) Frequency response: 20Hz to 20kHz
Marantz 4140 Vintage Quad/Stereo Integrated Amp Photo 749163 US from www.usaudiomart.com
The Model 4140 incorporates Marantz 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 Model 4140 25-Watt Quadraphonic Solid-State Integrated Amplifier
Marantz 4140 Vintage Quad/Stereo Integrated Amp Photo 749163 US
and that DCoffset at left channel was 356mV :nono: I replaced 3 7C type transistors A733 C945 and a C1318 i think. Stereo 2 and Quadradial 4 Console Amplifier (1977) (1 review) Specifications Many 4140s are no longer on the market in Europe, so it was worth the equivalent of USD300 to me
Marantz 4140 Amplifier Photo 1319408 Canuck Audio Mart. Many 4140s are no longer on the market in Europe, so it was worth the equivalent of USD300 to me Stereo 2 and Quadradial 4 Console Amplifier (1977) (1 review) Specifications
Marantz 4140 Photo 421635 Canuck Audio Mart. Experience high-quality audio with the Marantz 4140 Stereo Quadradial Amplifier It pushes a true and clean 25 watts x 4 channels, or 70 watts x 2 channels