Review on Enhance Speaker Performance with Second Skin Speaker Tweaker Kit: Anechoic Pads Sound Deadener (Set of 2) by Patrick Diaz

Probably the best thing you can put behind your speakers to diffuse and muffle gameplay. I do wonder, however, what the second skin was thinking when they decided to place a large flat surface that stretches halfway across the square. This obviously reflects sound waves instead of attenuating them like wedge shapes do. Luckily I was able to remove it fairly carefully with a utility knife except for the center which I just left there. In addition, these prices are quite high.