Studiofoam Pyramids are perfect to treat small to medium-sized areas including isolation booths, control rooms and sound studios. It will help effectively kill standing waves and flutter echoes and when used in conjunction with our LENRD bass traps or Venus Bass Traps or our Sunburst Broadband Absorbers, can effectively tame the full frequency bandwidth in virtually any acoustic environment. Studiofoam Pyramid is available in 2? and 4? thicknesses. 4? Studiofoam Pyramids are recommended for larger spaces, rooms with pronounced low frequency problems or where sonic accuracy is mandatory and stronger acoustic absorption is required.