The Akai GX-650 D is a reel-to-reel tape deck manufactured by Akai. It was introduced in the 1970s and is part of the GX series of tape decks. The GX-650 D offers 3 motor transports, 4-track stereo recording/playback, and provides variable tape speeds of 3.75 and 7.5 inches per second. It also features Dolby noise reduction system, which helps reduce tape noise. The deck comes with auto-reverse capability, allowing playback of both sides of the tape without manual flipping. Additionally, it offers various control options and adjustable recording levels for precise audio recording. Overall, it is a high-quality tape deck with advanced features for superior audio performance.