Big three? WTF is that?

 

The big three are wires:

1) From Battery - to chassis
2) From Battery + to Alternator
3) From Alternator - to chassis

Typical cars use 4 awg wire (some smaller)
But 4 awg is designed to run just the manufacturers components in the car. If your system requires 4 awg and upgrade to 2 awg is reasonable and 0 awg will be great and you'll be ready for future expansion.

 

a cap is a bandaid to a bigger problem. either get a better battery or a stronger alternator. optima yellow top is like 200+ bucks but well worth it!

 

The caps used in a car amp's power supply are used to filter AC ripple.. not to store power like you are thinking..

power caps have a place in car audio, and I don't really agree that they are just a gimmick... however in this case I doubt one would be noticably benifical...

 

Yea those have been upgraded from stock already! Stock is about a 10ga. for the groonds which has been upgraded to a 8ga for small ones and a 4ga for the main ones. I have a 0ga ground going from the batt. to the chassis and another 0ga. from the alternator to ground.