Tested the frequency response with speakers 14" higher and the results were worse. Already tried placing the speakers along the 13' width side but had poor results there before but can revisit - I had to sit almost at the rear wall to get any bass and that puts me right in front of doors. I think I had them out as far as 1/3 of the way along the longer length before and still had poor results.
The point here is to get that bass problem below 80Hz. If you can do so, then using a Distributed Bass Array like @tkoslek suggests will solve the bass problems.
I'll have to measure again...thought I saved the file last time. Sometimes hard to get the house quiet enough (kids) to do the measurements when I'm home.
