I have an Expedition with premium sound and cd changer, how do I install a new stereo in it, or...

Question

or is there another way to connect an amplifier and subwoofers?

Answer 1

you can use a PAC - SNI 35  high level converter. This peice for about $20 will let you tap into a rear speaker and will give you an amp output. This way you can keep the vehicle stock and just add an amp and subs.