Pioneer AM/FM Fluoroscan series stereo receiver model
SX-3500. From 1979 - 1981. Rated at 20 watts per channel. Features, tape
in/outputs, one phono, aux inputs, separate bass and treble controls, and FM
muting. loudness on/off, Also has a tuning meter, and both right and left
channels digital power watt meters. One of pioneers low end units.
Improvements were made on the next model up, the SX-3600.