[scot]

I have found that the corners are virtually useless for damping in my room. Seriously.

It is L-shaped, which might be part of the issue but my guess is that any normal non custom constructed converted home theater will be somewhat similar. I have 4 home made (and ugly as sin) bass tubes using insulation I compressed with chicken wire and covered with burlap. They sat in the corners forever. I started doing measurements with my new behringer mic and REW, and found I had 20+db dips at just under 60, 80 and 120hz. Walking around the room I could hear it get REALLY loud, then really quiet, so based on that I moved my sub around until I got what looked like the best application, then placed the tubes in the "loud" spots. With just one moved into a loud spot, it pushed up my db reading 6db.

Just so you understand how I checked that, I set the REW playing a constant tone at that specific freq ( 56.4) and watched the number. Put the tube where it was loud in the room, and it went from 60db to 66. I removed it, back to 60, put it back, back to 66.

Put a few more tubes in other loud spots, and gained another 2 or so each one. Then I noticed while moving one if I had it above my head the reading shot up to about 74, which is getting close to where it should be. This is 8ft up, in the middle of the room, so it is hard to imagine I could actually put something there, but...

I think the moral of the story here is that you need to figure out where to put the absorbers based on your room. The first reflection points are obvious, but reality is too complex to just say "here here here and here" for second, third, fouth etc.


If your corners are in a null (like mine) then the absorbers will do squat there.