Well, after several weeks of experimentation, trial and error, running both subs or just the Ultra, I've decided that I get the best, cleanest, sound with just the PC-Ultra. The addition of the PW-2200 did yield more volume, but wasn't as tight. I recalibrated with just the Ultra and it sounds sweet. I am very happy that it turned out to be so musical as I listen to 80% - 85% music over movies. I'm getting ready to remodel. My room will go from 20' x 24' with one corner having stairs and the utility closet, to a true rectangle of 15' x 24'. I bet the PC-Ultra and my maggies are going to like their new room dimensions!! Good decision...that PC-Ultra!!