Yes they can be made very cheaply. All you need is some wood for frames for the 2 feet by 4 feet Owens-Corning 703. Burlap is a cheap fabric that can be purchased in a few colors and is acoustically transparent. The best looking fabrics as well as performing are the ones from Guildford of Maine. I used GOM 2100 series in black for my panels.Try www.fabricmate.com for great prices on GOM. My wife complained about me making stuff until the end result. If you take you take and make sure the frames are straight, when you cover them with fabric, they look as nice as the commerically made ones. My wife likes them and says that they look good. I used Z-clips that you can get from www. rockler.com for about 12.95 to attach them to the wall. Unlike many tweaks, this one will be very easy to hear.
Best Cheap acoustic wall treatments?
I am converting a 12x20 space into a home theater and want to treat the room. The walls and ceiling are drywalled, with thin carpeting on the floor. Are there any inexpensive wall panels or the like that are available? Should I consider draping the entire room in fabric? Thanks for your thoughts.