How to Make Acoustic Panels Using Local Suppliers Buy the 1" x 3" board at Home Depot. Attached pictures show the nice wood and the crappy wood (which I buy) for $2.08. Buy black gabardine at SAS Fabrics, https://www.sasfabrics.com , 5320 E Speedway Blvd, Tucson, AZ 85712. It's $1.99 yard. You might be able to get different colors. Also, you can see if they have some thick (velvet-like) material to hang in your windows and doorways, to mute those spaces. Don't forget to use the http://www.auralex.com website to have them create a map of where acoustic treatment should go in your room. Buy the rock wool at the buisness below, $53.47 for a six-pack. Bring gloves to handle it. The six- packs are really big, so you can only fit a couple in a car, and maybe strap a couple to your roof. You might want to put a sheet underneath them in the car, so they don't shed fiberglass. Distribution International 3761 E 43rd 520-670-1157