This is my first system and I dont no much so im going to need some help. i am looking for 4 12'' subs that handle about 500 rms each and a ported box design to go in the trunk of my 99 ford contour. the subs will be firing up towards the trunk and i will cut holes in the rear deck for more sound waves into the cabin. they will powered by a hifonics brz2400.1d. i will upgrade to a h/o alternator and bigger batteries. if u can help in any way it would be greatly appreciated.