Originally Posted by jkasanic
Keith, would be great if you could document your process for building the custom panels? I know there are a ton of DIY treatment threads already but for those of us following your specific journey it would be great to see the detail as well as the measured results.
Well I can tell you now how I intend to build the panels. Take 4 pieces of planed smooth timber - two will be 48 inches in length and two will be 24 inches. Width of each piece will be 120mm, which IIRC is just short of 5 inches and thickness will be 18mm which is just over half of one of your American inches. Butt joint (ooher) and glue and screw them. Leave for 24 hours for the glue to dry. Take sufficient Camira Cara Black fabric to cover the frame and lay on floor. Place frame on top. Place slab of acoustic absorber gubbins inside frame. Draw back the fabric tightly and staple to the frame, in the back. Take one piece of any old acoustically transparent cloth of size 50 inches by 26 inches and fit inside the rear of the frame (in that approx 1 inch gap - frame = 5 ins, acoustic gubbins = 4 ins) and staple to frame. That step is to hold the gubbins into the frame, and to make the back look neat as well as concealing the gubbins itself. Turn acoustic panel over, admire handiwork, drink beer.
Each panel (I am making three - the full size one described above and two custom sizes which will fit in the screen wall/floor corner) should take about 30 minutes max to make from start to finish (with 24 hours in the middle for the wood glue to dry). Total cost I am guessing is about $25 each full size panel including all materials, but excluding beer. Or $200 if you factor in my time and the beer :)
After installation, each panel will have an additional thickness of gubbins shoved behind it, which will be invisible to bystanders. I am not making the panels double thickness to accommodate two slabs of gubbins as I want all the panels to appear the same, and of course my existing panels are single thickness only.
Once complete I will have to run Audyssey again and then I will remeasure with REW and we can compare the difference between the waterfall J commented on when he gave me this idea and the new waterfall incorporating Double Thickness Gubbins™. Remember this is solely aimed at improving the bit of ringing at 60Hz. If it doesn’t improve it, J will have much to answer for LOL.