Marantz AM/FM stereo receiver model 1550. From the year 1978 - 1980. Rated at 50 watts per channel. Features, two tape in/outputs, one aux input, one phono input, FM muting on/off, loudness on/off, filters 20hz and 8khz on/off, modes stereo/mono, speaker system selector one and two, separate treble, bass and mid controls, Selector - AM - FM - phono - aux - tape one - tape two, and both tuning and signal meters. Neat stereo receiver!