Hey, guys. Im a new member to this forum but I have on it for a long time now. (4 months). I have a question. I recently purchased a new sound system. My subs are 12" Rockford P3s, i have two of them. also, i have a full alpine type -r system speaker system. My question is would my car be able to handle this sound system without any upgrades? How about if I upgrade the "big 3"? IF not, what would I need to upgrade and what would be the approximate cost. Thanks.