I have 8, 2'x4' Audio dampening / diffusion panels. 4 black 4 maroon. These are great for reducing reflections in a music studio room. They are made on a 2'x2' wood cram with a layer of fabric followed by another layer over a pad of Roxul safe and sound insulation allowing a gap against the wall. 40$ each or 8 for 300$ Pls text for quicker response. Thx.