The 4" Studiofoam Pyramid-22 acoustic panel from Auralex is a recommended treatment for medium to large areas like concert halls, gymnasiums and churches, rooms with pronounced low-frequency problems, or where sonic accuracy is mandatory and maximum acoustic absorption is required.
Having 4-sides exposed on each pyramid provides more sound wave diffusion, desirable in certain spaces and yielding less overall dryness than 4" Studiofoam Wedges.
