This Marantz SD 3000 is a stereo cassette deck with Dolby B noise reduction, it was first sold by Marantz in 1979. The main features of the Marantz SD 3000 are: 2 heads, mechanical 3 digit tape counter, manual tape type selection and capable of handling normal, chrome and ferro-chrome tapes with additional manual equalization selection, belt driven single-capstan transport. Typical front loading cassette deck with the cassette compartiment located on the left side of the deck. Tape eject is operated mechanically and the cassette needs to be placed with the side to be played facing forward in the cassette well. Level meters used on the SD 3000 are generic digital peak reading meters. Mechanical transport controls for reliable SD 3000 transport function selection. 9,5 cm/s faster recording/playback speed used in the SD 3000 offers extended frequency response, increased dynamic range and transient response. SD 3000. The Dolby-B system reduces tape hiss on tapes recorded on the SD 3000 by as much as 10 dB at the highest frequencies. Unit has been recently checked and serviced. All belt have been replaced, speed motor adjusted, heads cleaned. Unit works perfect ! SPECS: Type: 2-head, single compact cassette deck Track System: 4-track, 2-channel stereo Tape Speed: 4.75, 9.5 cm/s Heads: 1 x record/playback, 1 x erase Motor: DC servo Tape Type: type I, FeCr, CrO2 Noise Reduction: B Frequency Response: 40Hz to 16.5kHz (FeCr tape) Wow and Flutter: 0.08% Dimensions: 416 x 146 x 239mm Weight: 6.6kg Year: 1979