My QS8s are on stands that I have been moving around a bit, experimenting. I made the stands a couple inches higher than the ones Axiom sells, so the tweeters would clear the back edge of the couch. Currently, I find the best surround effects to be had when they are place behind the couch and angled in at the listener. Essentialy, one tweeter fires forward and the other across the room at the opposite QS8. I've also tried to maintain that "golden triangle" situation that Chesseroo so graciously posted for us.
