Marantz SD-45 Monitoring Cassette Deck

This Marantz SD-45 is a stereo cassette deck with Dolby B/C and HX-Pro noise reduction, it was first sold by Marantz in 1986. Dolby C-type used in the SD-45 provides 20 dB of noise reduction above about 1,000 Hz, fully doubling the amount given by B-type.