Pioneer AM/FM stereo receiver model SX-1980. When the SX-1980 was introduced in 1978, it was the most powerful receiver in the world. It was rated at 270 watts per channel. Everything about the SX-1980 was on a grand scale, including its price tag that was $1295.00, making it the most expensive receiver Pioneer had ever built. Nothing like it had ever been built by Pioneer before, and nothing has been built like it since. Features, two separate bass and treble controls, tone on/off which turns off the bass, treble controls, filters 30hz and 8khz, tape duplicate switch, FM muting on/off FM multipath, Adaptor on/off which allows you to hook an equalizer up etc. mic left/right inputs, two tape in/outputs, one aux input, two phono inputs, phono two switch is for both mic and phono two, phono one cartridge selector, modes stereo and mono, both tuning and signal meters and both right and left channel power meters plus other features.