Sansui AM/FM 4 channel stereo receiver model QR-6500. From 1973 - 1975. Rated at 25 watts per channel RMS X4 into 8 ohms. Features, both tuning and signal meters, 1 and 4 channel selector and modes, two monitor for 4ch and 4ch, loudness on/off rear and front, front and rear bass and treble controls, balance and high low filters, two phono inputs, aux 2ch and 4ch, synthesizer decoder, FM muting on/off, tone controls on/off, separate bass and treble tone controls, front tape playback and record in/outputs, and many more features. Neat stereo receiver.