i have a 04 pontiac grand am gt. i bought the system ive been looking at for almost 2yrs now, im hoping its as good as i have been dreaming it to be. i guess if i would of read more i would have picked something with sq, not all spl. but im ok with that. could anyone tell me if i need anything else before installing.... i got: 2 orion h2 15.4 subs, 2 orion hcca d5000 amps, 1 15 farad stinger capacitor, 220amp ho alternator, upgraded "big three" wiring. i was also looking at : stinger drycell battery 2150, and a lightning audio 50 farad capacitor-> will i also need these for power? and anything else to run effectiently? sorry i dont know anything about being an electrician i would greatly appreciate the help. .....also as far as the system in general goes, what speakers (like 6x9s and the front door ones) would anyone recommend since the subs are all spl, little if no sq? thanks again lol