Getting two new amps that both say 8 gauge wire is recommended and im using a 2 farad capacitor with a distribution block top that will accept up to 2 gauge inputs. My current amp says 4 gauge wire is recommended and its less powerful than the new 4ch amp im putting in.

My question is should I just keep the 4 gauge power wire i have funning to the back and run that to the capacitor then run the 8 gauge wire to the amps or should I get some new 2 gauge wire and run that to the back then run 4 gauge (if it fits) to the amps? The distance from the capacitor to the amps will be under a foot probably.

New 4ch amp
http://www.crutchfield.com/S-rnuDQLB...sp?I=108R7541A

New mono amp
http://www.crutchfield.com/S-rnuDQLB...p?I=500MRPM450

New capacitor
http://www.crutchfield.com/S-rnuDQLB...arch=capacitor

 

If I need 2 gauge wire, are there any ready made kits with a fuse inline already that would work for me?

 

you are fine with 4ga... i used that amp in a buddies car with a bigger mono amp no cap and its great

 

Excellent, I really didnt want to buy and run 2 gauge all the way back there.

 

for that setup a 4 ga wire would be fine. hit that to a power distro block and then an 8 ga to each amp. same for the ground. 2 caps sounds a bit excessive. I only recommend 1 farad per 1000 watts being ran, but it's your choice. May want to go with 2 if you have underdrive.

 

Just one cap in there, the distribution block is on top of the cap.