My experiment/aim for this weekend is to raise the XO on my setup a bit and see if that helps reduce issues of cabinet resonance/loose bass a bit on the Q700s (not that it's bad at 80Hz in my estimation). Of course in playing around with the crossover setting last night I found an interesting problem that might stymie me a bit. In looking at the subs FR, changing the XO point up to 100Hz and looking at its output alone doesn't yield much change at my listening position vs the 80Hz XO; even cranking the XO up to 200Hz didn't increase its bandwidth that I could tell. I close miked the sub at that point and verified that it was operating as expected. So tonight I try I'll be wrestling 150+ pounds of sub to see if I can make a minor adjustment or two in placement that will hopefully help.