OK im pretty new to all this and was looking for alittle advice my setup as of now is 2 lanzar opti 1232 subs, lanzar opti 500x2 amp subs are in a **** prefab ported box i had them in my 300. I just went out an got a 94 suburban and am looking to put either 4 12's or 15's. So i need to know...