1. Home
  2. tech-talk
  3. 1301361715

Bass Trap help



_____________________
|---------------------- |
|---------------------- |
|-----------------------|
|---SP------------SP---| 14
|-----------------------|
|-----------------------|________
---------------------------------------
---------------------------------------
|-----------------------------------
5|----------XX----------------------
F \------------------------------------
FF \----------------------------------
FFF \---------------------------------
FFFF _________________________

My room sorta looks like this with the total length 25'

Im getting a rather large peak at both 63 and 80hz using warble tones and a Radio Shack sound level meter. The right from the listener opens into a kitchen. Anyway. I bought 27-Owens Corning 703 2"x24"x48" panels. Surely this is enough material? Stacking the panels 3 deep for 6" deep panels, that gives me 9 panels at 24"x48". Ive been moving them around, first trying 2 in the front corners, 1 to each side of the speakers, 3 to the rear (dead behind and one to each side, and the lasy one the wall to the left of the listening position. Zero different as read before and after using my meter.

I dont understand.

Help
jim1961jr
elizabeth
6,726 posts
 
The panels you are using are not for that low a frequency. For a 63/80hz (and cheap) you would need (large)cardboard boxes fill with flat bundled newspaper stacked floor to ceiling in the corner to have an effect at those frequencies.
You would be better off searching for a location for the speakers that cuts your resonance problem to a more reasonable level.
shadorne's avatar
shadorne
7,333 posts
 
Acoustic panels have very little effect below 100Hz a few dB is about all you can expect. Meanwhile room modes can easily be 15 dB or more. Straddle the panels across the corners. However you should hear a big improvement in the lower midrange.
brf
1,699 posts
 
For those frequencies google "super chunk corner bass traps". These work extremey well and are easily DIY'd
samhar
1,034 posts
 
You might try moving your chair forward in small increments and check readings.
ngjockey
1,042 posts
 
Even DIY sealed membrane traps, using 1/4" hardboard as the membrane would have to be at least 4'X4' or 4'X6' to be effective for 63 Hz.
More to discover