[turbosprentice]

Well, I was thumping my subs on my way to work and when I went to work and came home the car won't start. So i had a friend jump start it for me, when i got home i turned it off and tried to restart it, it wouldn't even start. I'm running two or pretty much three power source for the car, two battery for my two subs and my amps. and one battery in the front. I've been using and recharging them for about 1 year now. Can somebody help me find out why my car is not starting anymore? charging the car doesn't seem to work anymore. The frong battery seems fine, but I think the two in the back are pretty worn out. Does anyone know if it's my alternator or my starter?