These bass traps work in rooms of any size. Low frequency waves are long and difficult to stop, but corner bass absorbers solve the bass problems that collect in the corners of rooms. The standard pack contains eight absorbers, for each corner of a four-sided room, though smaller packs are also available. For rooms with severe bass issues and multiple walls, we suggest absorbers in every corner. They work great as general sound absorbers and in conjunction with other products.
More information: http://www.thefoamfactory.com/acousticfoam/bassbroad.html