Thanks exlabdriver. My room is fairly large at 14' x 26' but you are right, tweaking the crossover and distance settings seems to have fixed any perceived performance issues I was having. I think by adding a pair of rear surrounds for 7.1 (or .2)in the near future will also have a positive impact to cover more "dead" space behind the listening area. My "sweet spot" is located about 18' back from screen and my QS4's are about 1' further. All in good time.