Acoustone's Premium Speaker Grille Cloth
Acoustically Transparent

This is not a standard household fabric like others sell. Acoustone's high-tech yarns of vinyl-coated fiberglass make a smooth surface. So, unlike conventional spun yarn, there are no loose fibers to snag sound. That means no muffling, distorting or impeding sound from speakers.
Acoustone fabric fits in perfectly for home theater applications. It's widely used for covering speaker clusters in auditoriums, sound studios or organ lofts in churches.