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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 2 responses by psychicanimal

psychicanimal
1,738 posts
 
Here's some bedtime reading:

http://www.decware.com/room.htm
psychicanimal
1,738 posts
 
Rives, I like what you're doing for home audio/video. It's really commendable. Way out of my budget, though. I am working on the acoustics of the new townhome I moved to. The Carlo Foam Factory (www.foambymail.com)is about 1 1/2 hr from me and I've been invited to visit their showroom. Lak and I are planning on going pretty soon...

Yesterday I received a DOD 31 band/ch Eq I plan to use with a pair of Bose 901 IV's in my living room (2 ch HT/ background music). As I expected, room boom @ 80 Hz and what Tom (Nightdoggy) had diagnosed: screeching resonances in the x-over range of my Swans (3 - 5 KHz). Nothing that couldn't be solved with proper room treatment alone.

The Eq is for me to be able to get a flat response out of the 901's (they will be firing in direct mode). Tom had told me the Bose weren't as bad as people thought--that their Eq was responsible for a lot of the sound degradation, not the speakers. I wonder if the DOD will be able to substitute the Bose Eq. My 901's were a given by a friend and the foam surrounds need replacement. I think it will be a good project and will be better than those cheapo HT packages. Also, my entire living room, dining room and kitchen will be filled w/ music...
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