I know this has been talked about, but I have to relay a personal experience.
as some might know, my basement is rough for an audio system. huge issues abound. I had my 2 channel in one area of the basement that helped with bass response, but when I got the Bozak Symphonies, that bass response assistance became overkill. I moved the system to another part of the basement. While the bass tightened up, it actually seemed to almost dissapear.
also, I was getting listeners fatigue, BAD. With Bozaks, you know you got problems if your getting listeners fatigue. The only plausible reason was the new listening environment. I figured I was getting some sound reflecting off the walls. the fatigue got much worse at higher volumes.
So I figured it was time to get some foam. I got some 18x24 foam panels from parts express and started to play around. Long story short, WOW!
all the talk about room treatment must have been for a reason, I foamed the sides of my listening area ( I'll get pics) with about 4 panels each side. It literally helped every facet of the audio spectrum. Imaging, detail, bass response improved (never expected that!) depth. I expected to take the edge off the sound reflection, i DID NOT expect such a difference in sound.
put me in the room treatment is huge camp. I didnt even try that hard and got great results. The panels are not high on the WAF though. Luckily I have overiding dominion over the basement, unlike upstairs where my theater is.
This will be my new tweak direction, since I am very happy where I am equipment wise.