I stuffed the M5s and the 160 with foam in my main room and cut all speakers to 80Hz. I'm even more close now to not needing Audyssey. I have a very narrow band somewhere down low I need to knock down.
Incidentally, even with the sphincters plugged, the Onk found all my speakers at 40Hz which I find very surprising.
A-LFR/1000-8 & 2/500v4x2
Air Force, Freedom