The Akai GX-630 D-Pro is a reel-to-reel tape recorder produced by Akai in the 1970s. It features a 3-motor system for improved stability and accuracy, along with three heads for recording, playback, and erasure. The GX-630 D-Pro also includes features like auto reverse, built-in Dolby noise reduction, and adjustable pitch control. It can handle both 7-inch and 10.5-inch reels with speeds of either 7.5 or 15 inches per second. The machine has a sturdy construction and was primarily aimed at professional and semi-professional users.