I know there are 2 subs in back of the seats ('04 Crossfire). I wanted to know how loud I could turn the volume and bass up before blowing the speakers... right now my settings are: Bass -9, Treble 1, balance 0 and I can turn it up to 30 without any hesitations. But I wanna know I can maybe turn the bass up some with my volume still at 30 without worrying or even just keep the bass at -9 and just turn the volume up a few more notches?