I wonder if the new seating has affected the output of the subs, etc. Have you recalibrated/tweaked things yet?
It's been awhile, but I finally got around to it today. The seating and riser definitely did affect the room response. Below is what the raw response looked like before the room changes (i.e. before any equalization). Red is pre-changes, Green is post-changes (with chairs & riser added).
After about an hour of tweaking, the BFD has again worked its magic and returned my primary listening position to a very balanced response (below):
The BFD is truly a wonderful little addition to the HT. It creates a clearly audible difference to me.
On the other hand, despite running multiple subs, my responses in the rest of the room varies pretty wildly (though better than when I just had one). Below is an eye chart of what the response curves for every seat in the room look like. Fortunately I only sit in one chair, my guests can suffer.
