I found a fatal flaw in my listening area! When I reached forward from the couch to get the pint of IPA on the coffee table, I noticed that the sound had changed. I will be breaking out the SPL meters and the Mics. Next, a computerized spatial analysis will be done in the listening area, within a narrow circumference of the couch, to see where this happens. A three dimensional model will be built, but first, I have to buy a HP Printer that will handle the four foot wide rolls of paper that are necessary to view the room in context.
Or maybe it was just the way my head was tilted forward when I leaned forward. So I opened up, yet another IPA and everything sounded just fine.