Diffusors vs. absorbers room treatment


Hello experts,
I'm trying to toy with room treatments to see how it will improve my system. I just moved my system upstairs to a smaller room and I notice the sound is a little brighter than I would like. Can anyone tell me a basic or rule of thumb on where to use the diffusor and where to use te absorber? Or are they pretty much the same thing? I visited few website from like sonex, auralex, rpg etc. I am thinking about getting sonex classic since I thought they're pretty reasonably priced. Can anyone also recommend me some other that are not toooo expensive? My room is 14' wide by 13' deep. I place my sonus grand piano speakers about 2' from walls. Thanks in advance.
heeengky

Showing 1 response by jvogt

I'm using a TacT RCS 2.0 in my 10' X 17' X 8' room with
excellent results, and minimal diffusion (three
Room Lens clones I built). The TacT allows precise
diagnosis and minimizing of the room nodes, particularly
bass nodes) which are the most harmful to sound quality.
It made a remarkable improvement in my less-than-ideal
sound room.