Also, if the room has mucho cubic footage (lots up high and behind the listening position) will the listening position see 40Hz within 3db or, is the 40 Hz lower response figure for the 7-Pi sort of an "ideal case" figure?

With every speaker that I have owned over the past few years the low frequencies start to shelve down around 80 Hz or so. I just don't ever seem to be able to realize the specified response.