I've got the SMS-1 controlling dual EP500's in my den that's attached to the kitchen, etc. I'm a believer -- it smoothed out the BOOM my room recreated. My new, fairly flat frequency response allows more bass detail to shine through. Fabulous little piece of equipment, except that my wife saw the price and said "$600 for that little box? No more stuff for the home theater!"

Down: M80x2, VP150, QS8x2, EP500x2
Up: M3x2, VP100, QS4x2, EP350
Office: Audiobytes