Audio Wiring / September 3, 2018 / Lillian Chastain.
To understand the function of the car audio crossover one must first review the role of the car power amplifier. The power going into the amplifier comes from the car battery. After passing through the amplifier, a stronger and more powerful signal then passes into the car’s speaker system.
The audio preamplifier also plays a role in the equalization of the signal. The preamplifier allows the audio system to correct for distortions in the sounds that are fed into that system. The equalization performed by the audio preamplifier allows the audio system to bring the car owner a quality sound.
A visit to a store that sells parts for a car audio system will show that the car amp can be classified by more than just efficiency. The car amp is also classified according to the number of channels which send signals into the amplifier, where those signals then have their power increased. In a mono amplifier, the amplifier adds power to the signal from a single channel.
Use a self-tapping sheet metal screw and drill through the metal on the backside of the seat or into a part of the trunk floor NOT IN CONTACT with the gas tank. Remove the screw, and grind off any paint around this area. You want a conductive connection to the chassis. Drill the screw back into the hole you created, this time with the ground wire attached. Use some silicone sealant to seal up the bare paint area to prevent rust.