Broadway Control Cubes present an attractive, 'easy-to-install' solution for acoustic treatment where you want to control primary reflections, eliminate flutter echo and reduce standing waves. Made from high density six pound per cubic foot glass wool, Control Cubes are distributed across the wall surface to treat bothersome reflections that interact between the sound source and the listener. The panels are typically spread in an array so as not to completely deaden the room. This helps control acoustic problems while retaining a sense of 'air' or space in the room.