Auralex Elite SonoColumn Foam Bass Trap 1x4 Foot Panel (Box of 4)SonoColumns are Auralex's newest solution for absorption of low frequencies. Like the LENRD corner bass traps, the SonoColumns are an excellent way to tame low frequency anomalies in your room, and offer some great decorative alternatives. The 4' long SonoColumns are designed to be stacked on top of one another to create an 8' fluted column anywhere on the wall. Or, they can be placed in the corners where bass build up is most often present. In