Room treatments

read the Master Handbook of Acoustics

and BTW, you don't want the quietest room...

noisy from traffic?  or?

people should definitely work on their listening rooms

walk around clapping your hands and post what you rear - you may need more absorption

also, how close to a rear wall is your listening spot?

ASC is fine ... when used as directed in a program of regular professional care...

sounds like they weren't done properly - not surprising at an audio show

GIK is helpful over the internet; ASC is, or was, helpful in person

18 inches is not bad, but an absorbing panel right behind your head might be a good idea - you can put acoustical cloth on them so they look like an art print

are the side diffusors as big as a bookcase?

I foget when I bought my cal. mic but they run about $80

pics & dimensions needed

wait - the showroom was meticulously treated 'BY' ASC?

or with ASC products??

yes, the newer items are hybrid devices, working in 2 different freq. regions - read all about it in ... Master Hndbk..