Late-1970s hi-fi history, Marantz SD-3000 Stereo Cassette Deck. Built like a absolute tank with a thick aluminum faceplate and two massive, beautiful analog VU meters. 
 
This particular version is rack mountable, making it a highly sought-after two-speed deck. It lets you switch to double speed (3 3/4 IPS) for your own recordings, capturing a level of audio fidelity close to a reel-to-reel tape machine.
 
Rare 2-speed playback/recording, Dolby B noise reduction, Mic/Headphone inputs, and a mechanical tape counter.
Rubber belts replaced, fully tested and working, with Fast forward, rewind, play, and record all function properly. Light bulbs for the VU meters are working.
Excellent vintage condition. The silver faceplate looks stunning with minimal age-related wear.
 
Perfect addition to complete a classic silver-era Marantz stack.