^^ Wtf man, i'm sorry but thats a stupid view really. Ever heard of surround sound?? Ever been to a proper club with speakers in all corners of the main room??
I'd recommend gettin comps for the front and back, amping it all, making sure everything is electrically matched (i.e Impedence/Wattage etc) snd then a decent single 12" sub.
Any decent head unit will give you full capability to adjust the fade more towards the front or rear, giving you a fuller sound if balanced correctly. I usually have to fade slightly to the rear and slighty to the left also, seeing as i'm closer to the right speakers which appear louder, if that makes sence. Its all about me, screw the passengers lol!
But seriously if you have people in the back with no speakers it'll just sound sh!te and personnally i feel the fuller sound in the whole car is much better then raggin your comps at the front to keep up with the sub.
This again is only my view. Clearly other people think different but listen to me, not them lol
