I have wanted to get the JVC 6-Piece 5.1 Home Theater Speaker System for quite a while now... but do i need a reciever for them? The discription says : Complete your home theater system by adding these speakers to your surround sound receiver, DVD player and TV: Does that mean i can hook the speakers up to the Sub-Woofer and hook the Sub-Woofer up to the Tv? Or do i need a Reciever?