Thanks to alot of info from this site and a few others i finally got brave enough to relocate my 2 amps behind the seat and add a kinetiks battery in parallel for steady power...The battery is probaly overkill but my lights dim with the bass at night so i hope it helps...I have already done the "Big-3" wire upgrades...I think the 09s have 130amp altenators stock but not sure...

list of my system:

2x-front doors- Infinity refs
2x-rear doors- Rockford 3ways
4x-subs- Rockford P3sd210
1x- Rockford P500x2 (subs)
1x- Rockford P400x4 (doors)
1x- Kinetics hc600 battery

i will try to add some pics to my gallery when i get done....im still waiting on the other 2 subs and the extra battery..everything else is already installed...heres a rough drawing of the wiring when i add the other battery..




gunna put the battery between the amps...

 

Battery installed......guy at the car audio place said it would not help my headlights from dimming.......he was wrong...i rocked all the way to work last nite and no blinking at all...checked everything when i got there (about 40 min. drive) and nothing was too hot...amps were warm but not hot...after a week or so to make sure everything is fine i will remove again and carpet boards then dress it all up alittle...thanks again for sites like this for all the info...

 

Sweet! do you have a pic of the sub box?

 

no 4-sub box yet...still using the 2 single downfire boxes i made....thinking of trying a 2 sub ported box for my 10's..not sure which would be better...will post some pics as soon as i do build a box...the single boxes sound ok...pics of them in gallery..