Audio Wiring / September 3, 2018 / Lillian Chastain.
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 gauge of the power cable is determined by the specifications of the amplifier you are using. The owner’s manual that comes with the speaker will probably tell you what gauge cable to use. If it does not, consult with a tech advisor from the manufacturer of the amplifier to find out.
Now that the wire’s inside the car, you should run it under the carpet. Once you pull up the trim pieces, the rug should scoot out of the way pretty quickly. For front speakers, run the fence alongside the RCA cables on the passenger side (for front speakers) and then to each speaker.
Not every car audio crossover operates in the same fashion. Crossovers vary as to the number of frequencies sent to other components of the car audio system. Crossovers also vary as to the rate at which the wavelengths are attenuated or cut. This rate, however, is not fixed. The owner of a car audio system can adjust the speed about which the crossover attenuates or cuts the frequencies that become fed into the power amplifier.