So now after a number of days with the new subwoofer, I think I have gotten it dialed in. I have to say that it sounds pretty good now. After listening more and more I found that the proper level to blend with the M22's was really just above 9 o'clock on the volume dial, a bit lower than I had originally had it set. This seems to take out any additional boominess and doesn't overpower the main speakers. I would have to say that for my ears the "break in" period was very real. The sub sounds much different now than it did the first hour out of the box, and that is a good thing. I am sure that most of that change is due to dialing it in, but I really think it has just gotten to flex its muscle a little too and now is more responsive. Thanks to everyone for their comments and help...
