bluemidget123
Junior Member
So, I have a 98 Eddie Bauer expedition that has a mach factory system in it. i want to up grade everything. but i want some info before i start. is there a factory amp? if so where is it? can i install a new head unit and connect it to the existing amp and then upgrade the speakers too? from what i have been reading, i can replace the factory sub with an aftermarket sub. could i hook the new sub (the aftermarket one i replace the old one with) to the stock amp or will i need to get a new amp as well?