I built some DIY bass traps and put them in last night. They measure 4'x2' and 6" deep, using Safe n Sound sound deadening material (It was praised on several forums with measurements similar to rockwool)
I installed 2 traps laying down under the screen backs directly against the front wall, pushed out to the sides against the corners. A third trap is in a rear corner at a 45* angle. I have a fourth to install but ran out of material.
Now, I didn't have any issues with the sound before, I just built these traps for fun, hoping maybe I'd hear a difference. The theater room is an open back which goes to the bar room. In the bar room it seems that the bass was reduced a lot, however in the theater room it seems about the same.
Now as far as measurements go, it seems like the traps introduced some nulls and didn't really take care of any peaks. TO MY UNTRAINED EYE, the traps made the response worse.
I have uploaded before and after measurements for left and right channels.
This is a 5.0 setup, no subwoofer yet. Audyssey XT 32 is turned off. Smoothing is at 1/24
Any tips, pointers or general opinions of my measurements would be appreciated. Also, does my decay time seem good ? The traps did seem to decrease decay. I have 4 2x2 wall panels to go up at the early reflection points, perhaps that will improve my upper response.