Marantz AM/FM stereo receiver model
SR 4000. From 1979 - 1981. Rated at 50 watts per channel. Features, one phono
input, two tape in/outputs, one auxiliary input, loudness on/off, muting,
low filter, tape copy 1 to 2, speaker selector system one and two, tuning meter,
also features led power watt indicators, separate bass mid and treble
controls. A Marantz classic.