So I did the sub crawl with the sub gen 3 and found the best spot I could find. While doing initial measurements it seemed quite flat, but now a day later, I remeasured and there's a lot of dips.
I use a beam gen 2, 2 one SL's as surrounds and the sub gen 3.
Blue is with trueplay and orange is without. After trueplay the 30hz was on par with 50 and 60 and I didn't have the dip between 50 and 70.
Without trueplay 30hz rattles the doors and is painful to the ears anywhere but the couch (it's probably in a null or something).
Any tips to get this to be a bit better?