Onkyo AM/FM stereo receiver model TX-666. From 1973 to 1978. Rated at 45 watts per channel. Features, two aux inputs, two record outs, one play in, one phono input, high and low filters on/off, loudness on/off, mode - mono on/off, tape monitor, mic input with mic mixing control, separate bass, and treble controls, selector - AM, FM, phono, aux one, aux two, and both tuning and signal meters.