I'm almost done with my first DIY sound absorption panel -- I just have to attach the outer fabric. The method of absorption in my case is 7" of R13 insulation and a layer of poly quilt batting. Anyways, with my 15"x5"x48" w/d/h panel nearly completed, I decided to set it up against the right-hand wall to tame the 1st order reflection from my main L speaker. When I did this, I was surprised to see that the dB level at the listening position actually increased by a couple of dB. I'm using the Radio Shack analog SLM. I can only guess that the 1st (and subsequent) reflections were actually cancelling out some of the direct waves from the speaker, and adding the panel limited this cancellation. Can any of you acousticians help figure out what could be going on here?