The Akai GX-R 66 is a cassette deck that was produced by Akai. It features a 3-head design, which allows for simultaneous recording and playback. The deck has a frequency response of 30Hz to 19kHz, with a signal-to-noise ratio of 58dB. It also includes Dolby B and C noise reduction systems. The GX-R 66 has auto tape type selection and calibration capability. It was released in the 1980s.