ATS Tri-Corner Acoustic Bass Traps are designed especially for use in the corners, where walls and ceilings meet. They can help reduce the boominess in rooms like home theaters and smaller production environments where sound can collect in the corners, particularly deep sounds. The air gap behind each panel also adds to the bass absorption properties. Highly effective as a broadband absorber, these bass traps flush mount seamlessly in the corner. Installation is easy and fast to install or relocate because of the virtually invisible magnet installation system. The frameless lightweight construction features a 6-7lb density fiberglass core for professional studio quality sound absorption. Corner bass traps are Class 1 or Class A Fire Rated per ATSM E84, and have a Noise Reduction Coefficient (NRC) of 1.05 out of 1. These bass traps are recommended for 90 degree angle corner joints where walls and ceilings meet, and are often used in every corner of a room to reduce echo, reverb, and booming bass.