Pioneer AM/FM stereo receiver model SX-850. It was introduced in 1976 and manufactured up till 1977. Rated at 65 watts per channel RMS and a price tag of $500.00 back then. Features, separate bass and treble controls with turnover switches from 200hz and 400hz bass, 5k and 25k treble, also tone on/off FM Mpx filter and muting on/off switches, low and high filters on/off, two tape in/outputs, duplicate switch, adaptor switch that enables you to add an equalizer etc. two phono inputs and one aux input, phono two selector is also the mic selector, mode stereo and mono, loudness on/off, mic input, muting switch and both signal and tuning meters. This receiver was built to last and perform for many years. You will never see a receiver built like this again.