The convention we've been using is to look at the modal region "unsmoothed". 1/48th shouldn't be a huge difference (at least it's not with my plots). The below 30Hz ringing will be very difficult to eliminate with treatments as you'd need VERY thick absorbtion down there to have any impact...not "impossible" as I've been told but very difficult. In any case, you're not alone and most have said THWI and moved on to reflections at that point.
I just did a 1/48 SPL because i was dong a waterfall and 101 says use 1/48 for waterfall - normally i would do unsmoothed for bass SPL.
thanks - it is good to know it is not an unusually bad waterfall.
i am near the THWI stage - 130 lb subs are a PAIN - even with the stupid "magic" sliders on carpet
As I recall, your MLP is not centered along your screen wall (isn't it shifted to the right side of the room if you're sitting in your MLP)? Did you ever try moving your soundstage so that it is centered along your screen wall and then putting your subs at the 1/4 and 3/4 pts along that wall? If I remember your room dimensions correctly (as well as the advice you've already been given in this thread), this should smooth out your natural response and then perhaps your Audyssey result will look a little different (in the frequency domain that is). Again, if you want to eliminate the ringing below 30Hz be prepared to invest a lot more effort than sliding your subs around...