IAW
https://www.decware.com/cgi-bin/yabb22/YaBB.pl?num=1614882463 I thought I'd share my little journey.
1. 2 side wall absorber panels 24x48x2
https://www.dropbox.com/s/76rgzcbxrhc5k8e/20210314_102218.jpg?dl=0https://www.dropbox.com/s/eup177hy9frf5l1/20210314_102228.jpg?dl=0Notes: For the all important 1st reflection points. I added bracing in the back sides, cutting into a little of the Owens Corning 703 fiberglass boards to accommodate. I added screening, tight across tops & bottom, on the front sides as a foundation for a nice flat unwrinkled affixment of the acoustic fabric. I will also affix that white underlining fabric you see on the underside of alot of furniture for a nice finish in the back sides. The screen & underlining will also serve to keep fibers from the OC fiberglass boards from getting out into air.
2. 2 tube bass traps
https://www.dropbox.com/s/4qhaj27t8ocypn7/20210314_102157.jpg?dl=0Notes: These had to be cut exactly 1/2 height of ceiling. I attached 26/32"x1" plywood using a thick bead of gorilla glue to attach to the bottom of the tubes. I cut the plywood with a jigsaw. The heavy plywood will also serve to keep the tubes from tilting. The bottoms must be airtight and the tops remain open for these to work. WAITING ON FABRIC.
These can be filled [loosely] with "Poly-fil" for a wider bandwidth. I might try this, however I'm told that these should be left empty for a narrower bandwidth which directly addresses problems with the kind of bass buildup specifically associated with small rooms.
By the way, the bag of 26/32"x1" plywood blocks will serve as "feet" to the wall panels and the diffuser panels, so that they are offset from the wall by 1". This vastly improves their effectiveness. I will glue one to each of the 4 corners of each device, then affix them to the walls using "3M 17206 Commander Large Picture Hanging Strips". 4 of these will hold more than 16 lbs [one strip is rated at 16 lbs.], though the panels are a little lighter than 16 lbs. Affixing this way avoids holes into the walls, and allows for ease of moving them around.
3. 2 rear corner absorption panels 12x24x2
[Not started yet]
Notes: Will be built just like wall panels, only 1/2 the size. Mounting will be 45* across the 2 rear adjacent walls, between the tube bass traps and the upper corner-to-ceiling trianglular absorbers.
4. 4 upper corner-to-ceiling triangular absorbers 14" on all 3 sides
[Not started yet]
Notes: These will be constructed with heavy duty cardboard, folded. White felt fabric will cover them. They will be stuffed with "Poly-fil" One can fill with old socks if you like. They will be affixed into position by "T-pins" into the ceiling tile. WAITING ON FELT FABRIC.
5. 4 AI Audio Group "AQD1" styrofoam quadratic diffuser panels
[Not received yet]
Notes: 2 male + 2 female panels. These will be painted black with 6-8 coats of water based paint, with Elmer's some glue mixed in for a nice hard finish. This keeps them reflective for the diffusion effect in the room, and not partially absorptive. They will be framed with the same pine furring strips as the absorber panels, which will be sanded and stained for a nicer visual effect.
Ongoing efforts will be updated as they occur. I am waiting on delivery of acoustic fabric and felt fabric.