I have made many improvements implementing room treatment. I have over dampenened, then gone back to reduce such. Properly treating your room, is one of the most important things one can do. I will continue to do so, with the advice of Jim Smith and Dennis Foley. IMO, room treatment is a component in its own right.
Over damped Room?
I recently moved into a smaller listening room (10' by 13') and had floor stander that had to go from old house...I ended up with some atc scm19 v2 and thought I was done with room treatments...lately I have been turning system up...way up to get some grunt/dynamics going...having 200 watts... today I removed the rear bass traps and man my speakers can breath again...
I was all set to get new subwoofer and cables...couldn't for the life of me figure what was missing...
Micro details,air more low end...Definitely worth trying.