Let me echo Polk432. My room is extensively treated with ASC bass traps and diffusion devices. However, after all that there were still two bass modes that the traps couldn't ameliorate. The PARC worked wonders. Not cheap, approx. $3500, but worth it.
Room Treatment
I have been going back and forth regarding room treatment. Two weeks ago I tried ASC 16" round tube traps in the front corner...the results were minimum. Considering I don't have any room treatment I expected more! Now I'm trying to figure out if my room needs room treatment...20' x 24', carpeted, 8' ceilings. I played several songs and walked around my room and noticed excess bass in the front left corner. Looking for some advice regarding room treatment.