So i understand that i have the premium system with crossovers in the back of the head unit. my question is that if i buy a pair of 6.5" components (nothing too fancy, just better than stock, maybe Alpine type S) can i just use the factory crossovers with the aftermarket speakers? just drop speakers in the factory holes and connect existing wires. i really dont want to have to run new wiring thru the door jams. lover end components just use a simple in line crossover network anyway.