So, it sounds like the benefit of running four instead of two, is that the bass isn't necessarily lower, its just a little louder. I actually will use the speakers for music. (I say will because I have agreed to buy a pair which I will pick up when I move, in about a month)When I auditioned them, the bass seemed just right for jazz, and a little light for rock. I think a sub might be over kill. Maybe it will be different in my room.This being said, has anyone ever heard these with a sub-sonic five. Thanks for all your help and experience.Peter