Ok my sub will be here Tuesday and imma order the amp when I get the money! My stock alt in my scion tc is 100 amp I'm getting the AQ HDC3 12 and the AQ2200d and I will also be getting the AQ 4 channel amp to push my 4 6.5 eminence door speakers! So I know I need something new alt? New bat? If just adding a new kenetic bat will work which I know it will where can I buy one? And maybe upgrade the stock front bat to a red top optima? What do you think? I will be getting another hdc3 12 and a 2200d around Christmas can you say SPL? LOL but for now help me out with just the one! Thanks everyone!