The car radio system`s speakers are greatly dependent on the amplifiers for they drive the speakers to create sound. 1 din autoradio android gps bmw The amplified electrical signals received from the amplifiers are converted into mechanical energy that is responsible for moving the cones in them back and forth. This movement creates vibrations and finally reaches our ears as sound. Music is nothing but vibrations in air and these vibrations are effectively created by these speakers with the help of the amplifiers. You can use a range of speakers to create a good sound effect. The woofers and sub woofers are used to produce music with additional effects.