Audio Wiring / September 6, 2018 / Raquel Dufour.
Remove the head unit from the dash. You’ll be connecting not only the RCA but also the remote turn on lead. Connect the remote turn on and run it alongside the power wire on the driver’s side all the way into the trunk. Replace the driver’s side carpet and panel. The RCA cables should run down the passenger side.
The audio preamplifier does not alter the power of the signal in the car audio system. The audio preamplifier provides the sound system with a way to gain voltage. After a signal passes through a preamplifier, and after that signal gains voltage, then it passes into a power amplifier. The power amplifier gives the signal more power; it raises the amount of current in the signal.
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.
The audio preamplifier has several different functions. Its primary function concerns conversion of the sound information carried by the audio system’s electrical signals. The analog sounds produced by the car radio or the CD player enter the audio system as low-level signals. These low-level signals travel through the audio system to a pick-up or a transducer.