Auralex Studiofoam Pyramids, Set of 6, Charcoal Gray, 4-inch Thick, 2-foot x 2-foot Panel, NRC 0.95, Auralex Item 4PYR22CHA-HP.
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.
• Eliminates standing waves and flutter echoes
• Reduces unwanted reflections
• Decreases slap-back and room ring