| Stickler point...you actually will not do any RT60 analysis because there is no reverb in a space of your size...I know people talk of decay time and that's important to look at in terms of modal resonance...but there is no reverb.
Sorry to go "SAC" on ya...important point to clean up though
I did some analysis that allows me to shows not just modes, but how speaker/ear locations factor in what is heard...and by pushing the speakers wider I could duplicate the smoothing of the 60Hz area and create big push around 175Hz...so alot of what you mave may indeed be modal.
The ceiling: that's the weak link in your plan is given...a simple general suggestion is to drop your cloud about 16" below ceiling and add R-30 batt insulation above the 2" fiberglass. If your cloud is 4' wide, you may need to go twice that.
Now...I don't want to send you on goose chase...think of this after you have superchunk and rear wall/ceiling done. As the 1,0,1 is an issue...the rear wall/ceiling should help.
The worry in all this is losing the war of a balanced room to win the battle against one mode...simply put a totally dry/dead room is not good (sure you're aware). |