I have Infinity refernce 3 way 6x9's in my rear deck. I just bought some Jl audio XR components for up front. I'm not sure whether I should get a 4 channel amp for all the speakers or whether i should just get a 2 channel amp for the components up front and keep the 6x9's on deck power. Also if i have an amp for just the front speakers would i even be able to hear the back speakers. i just want to see what some of you guys recommend i do.