The Akai GX-F 91 is a cassette deck that was produced by Akai in the early 1990s. It is a high-end cassette deck designed for audiophiles and enthusiasts. The GX-F 91 features a sturdy construction, dual-capstan design, and has three heads for recording, playback, and erasing. It offers various advanced features such as Dolby B, C, and HX Pro noise reduction systems, auto tape type selection, and bias fine-tuning. The cassette deck also has adjustable record levels, electronic tape counter, pitch control, and a headphone jack. It provides high-quality audio playback and recording capabilities. The Akai GX-F 91 is sought after by collectors and vintage audio enthusiasts.