The Aiwa AD-WX909 is a dual cassette deck system with both recording and playback functions. It features a digital signal processor for improved sound quality and noise reduction, as well as a variety of playback options including auto reverse, automatic tape type selection, and Dolby B and C noise reduction. It also has a variety of recording options including dubbing, synchro recording, and manual bias adjustment. The unit includes a 3-way Dolby HX Pro head system and a remote control for easy operation. It was first introduced in the early 1990s.