Unless your running mega power for some sort of competition car stero i think the wire you have should be fine. The only probelm i can see is running the rca cables through the car. I did this but running it under the carpet in the middle of the car, under the seat and up into the boot. Power wont be and issue as the battery is in the boot already, so just put in the fuse between the battery and the amp, and wire in the power cable. Dont forget a decent grounding cable aswell. If you need help and feel like a drive to Wheelers Hill (near glen waverley) pm me, i will be trying to fit my cooler tomorrow but will still see if i can help.