| right...back to original post of nasty dips 100Hz to 400Hz.
I know you have a great deal of data posted on your space, but can you present data in this area (or link to it if already posted)?
Could be floor dip (can often be in 100Hz to 200Hz zone).
Thing is that often narrow dips aren't a major problem as our ears can deal with them...when they are neighbored by sharp peaks...then you can have big issues.
Have you "trapped" all corners including wall/ceiling junctures? If so, you're likely not having a modal issue but rather a boundary interference...and it's not out of the question that room furnishings are a factor.
I know you're manically trying to solve...hope this helps and sorry if too vague...comes a time when you need ears in the room to solve pesky singular issues. |