Audio Wiring / September 5, 2018 / Raquel Dufour.
Route the power cable from the battery through the passenger side of the car to the amplifier in the trunk. It will prove most natural because the battery is commonly on the passenger’s side of the vehicle. You will have to feed the power cable through a rubber grommet on the firewall.
Sometimes a power amplifier comes equipped with unique features. The car audio crossover can add to a car amplifier. A car crossover allows the amplifier to divide the music by frequency. The split signal becomes strengthened by the amplifier and then leaves the amp and proceeds to another part of the car speaker system.
If you are not comfortable with electrical wiring, do not attempt this installation. Have your stereo installed by your car audio retailer. Do it once, do it right! Don’t take the easy, shortcut way to do things. Do it correctly the first time. Believe me; the “shortcut” will cost you later in both time and money. Run your power and ground wires on the opposite side of the RCA and remote wires; this will help the overall sound quality of your system.
If you are using passive crossovers with the component speakers in the front and rear of the car, hooking up these crossovers can also affect the ohms load seen by the amplifier. Hooking up the passive crossovers’ positive and negative properly can be a concern. Follow the speaker manufacturer’s instructions carefully.