Custom Sized Black Wedge Foam for Any Surface. For Every Environment of Your Life. Wedge Foam is the most popular acoustic foam. Our wedge foam outperforms and outlasts the competition at an affordable price. Because our foam is machine cut, you can expect it to be nearly identical side to side. Wedge foam provides sound insulation, helps eliminate echoes, offers a professional appearance, requires minimal installation effort, and is an excellent studio foam.