500 Dual-Tracer is a two-head stereo tape deck marketed by Nakamichi from 1974 to 1978. This model is equiped with a "focused-gap" head, considered as a technologic breakthrough at the time.
FM tuner preamplifier made by Nakamichi. Phono, auxiliary and tape input. Separated outputs preamplifier/tuner. Bass, treble and contour controls. This device is japanese, so the FM waveband goes from 76 to 90MHz.