I have a couple of problems with the placement and fitment of my 24" x 48" panels from ATS that I need advice about. I've included some pictures to help illustrate my situation. To me, these panels are too large for the area behind my 38" tall mains:





As you can see I haven't yet mounted them to the wall so they'll look even more overwhelming for the space when they're 3 - 4 inches off the floor. My plan is to order two custom sized panels that'll look less daunting there. My question is: How small (especially in width) can I go before they start to lose their ability to trap the lower frequencies? I realize there are other room acoustic factors that need to be considered (I have four more 24 x 48 panels still to build and hang), but as I've mentioned I have plenty of furniture in the room now to help with reflections and stuff.

Another advantage of buying some that are already constructed is I can see how ATS does things like fasten the mounting brackets and finish (fold over) the grill material. I have a problem in this area too. On the first panel I put together I used a brand of spray tack that was recommended by a woman at the craft store where I bought the burlap. Problem is, it doesn't hold the burlap to the 703 fiberglass panel on humid days, meaning, bubbles in the burlap form. Unforunately, the panel that I built using 3M Super 77 spray adhesive has the same problem. Maybe I didn't spray enough on the surfaces, maybe I didn't alow enough time for the adhesive to set before pressing the two together... who knows. So the next question is, how much adhesive is too much? At what point will the adhesive become a barrier that actually inhibits the panel's ability to absorb sound?

Any help would be greatly appreciated because I still have four more panels (six after I buy two more) that need to be assembled and placed. I certainly don't want to end up with a room full of oversized panels with drooping grills.