A5 Audio Receivers or 'decks' are the part of the vehicle that produces the sound that powers your speakers. A5 Audio Receivers can include LCD screens, GPS navigation, DVD, MP3 playback, IPOD connection and a variety of other features. Popular audio receiver brands include Alpine, Sony, Eclipse, Clarion, Pioneer, Kenwood, Aiwa, Panasonic, JVC, Blaupunct, Dual, and a variety of others. Car A5 Audio Receivers can cost anywhere from one-hundred to two-thousand plus dollars.