car audio is a radio and playback device designed to reduce the dullness of driver and passenger travel. The earliest used car AM radio, and later AM FM radio, tape player, developed to CD player and compatible with DCC, DAT digital audio.
Car audio refers to the sound system installed in a vehicle (usually a car) to enhance the listening experience for the driver and passengers. This includes stereo or radio head units, speakers, amplifiers and subwoofers. The head unit, also known as the receiver, provides the main source of audio input and control for the system, such as adjusting volume, changing tracks, and connecting to different sources such as Bluetooth, USB, or a CD player. Speakers, usually located on the dashboard, doors, and rear deck, convert electrical audio signals into sound waves. Amplifiers boost the electrical signal to drive speakers, and subwoofers boost low-frequency bass.