If I was going to get speakers to run off the head unit. Do I still need crossovers like a component set. Or would it be pointless because I dont have a 4 channel amp, so it doesnt matter. Can I just get speakers because the rear ones already have crossovers and they are kicker. What are some good cheap 6 1/2 speakers to just run off the head unit. I just want sound, I have nothing in the front atm.