The Absolute Sound disects SAM

[ogs]

exciting a room mode and if that is the case, reducing the setting could well reduce the noticeability of the issue

That makes sense. I measure for room correction on top of SAM (90%) and this will obviously detect any resonant behavior in speaker/room. Without rc I would have to adjust SAM % down to avoid the extra energy from room modes. In a previous speaker setup I had  a very strong peak at 47Hz (+12dB) and one at 94Hz. When I moved speakers to the long wall, much of this disappeared.
Another thing is that SAM's  phase correction in the bass may make previously 'hidden' frequencies audible.