Well, they arrived on Wed! I spent the afternoon setting them up and messing with the settings. Then I remembered I had an old Audio Control Richter Scale. It has 2 channel sub xovers and proved to be the perfect solution. Now, the bass is smooth and satisfying, if not quite as loud as I had hoped. I will continue to tweak the system. I really need to weight the boxes down with something. The wife won't like a 90 lb. sandbag like the good ol' days, so I'll have to come up with something more decorative. Count me as a satisfied customer. Perhaps a LFM-EX is in the future for the .1 channel...