The Akai GX-620 is a reel-to-reel tape recorder that was manufactured by Akai in the 1970s. It is a 4-track stereo tape deck that operates at a speed of 3.75 or 7.5 inches per second. The GX-620 features three motors for superior tape handling, along with a direct-coupled amplifier for high fidelity sound reproduction. It has various playback and recording features, including automatic reverse and built-in sound-on-sound capabilities. The GX-620 is known for its durable construction and reliability.