Matt is right. It can be done with some y-adapters but like he said. You will loose your front to rear adjustment. When its just a single pre-out most commonly it is for the front. It will also cause you to loose your "surround effect"(lack of a better saying). IE say you listening to song that fades a drum beat and some other kind of sound from left to right or vise versa on the rear channel, you will not hear that anymore with a set up like that.