AlphaSpiral Traps are designed to fit over a tripod base microphone stand for maximum performance. This trap is intended for low frequency absorption and also works best if placed in the corners of a room. The design allows for quick acoustic adjustment by raising or lowering the height of the stand depending on the requirements of the room. AlphaSpiral traps come in two sizes, 4' and 2' high, by 10" wide in 6 different colors.