It is 600w RMS, and 750 peak amp. Powering a 400w RMS speaker. I have seen much larger systems on the forum. What If I decide to do the componets, which is not necessary. controlling the amount of bass going to them, would be a better solution, for now. I realize the battery needs to be replaced, since it is factory, on a 04. I plan on the big three, but wasn't sure if you really needed to use 0 gauge wire. The connectors for those suck, to work with. I have done a couple of battery relocate kits on twin turbo 03-04 cobras. I thought anything bigger than what is there, would help. 4 gauge is a thick wire. At work we use 220v three phase power, and use 12 gauge thhn to supply power to electrical cabinets, and machines. I just need to compensate for 1 or so volts. Can any of you guys recommend a brand of capacitor. I would rather order online, vs. the prices locally. Thanks, chris