The Akai X-360 D is a vintage reel-to-reel audio tape deck. It was manufactured by Akai in the 1970s. The X-360 D features a three-head configuration, allowing for simultaneous recording and playback. It operates at a tape speed of 7.5 or 15 inches per second. The deck has various input and output options, including microphone inputs, line inputs, and line outputs. It also has a built-in speaker for monitoring purposes. The X-360 D was designed for home or semi-professional use and was praised for its sound quality and reliability.