2 GIK Acoustics 242 Art Panels, "abstract" 4'x3' While these will obviously work on your wall, they work equally well when placed on reflective items in front of your listening position - especially glass or even wood coffee tables - very easy to hear the difference especially at lower volumes From non-smoking, no-pets home https://www.gikacoustics.com/product/242-acoustic-art-panels-3-625-inch/