A resonance bump in a room's frequency response is called a room node. Bass traps substantial enough to control nodes have always been expensive to buy or intricate and time-consuming to build - not anymore.
The Stand-Mounted LENRD (Low-End Node Reduction Device) is 48" tall instead of 24" like standard LENRDs and each one of four comes complete with a stand. In "normal" mode, the unit stands about six foot tall, but in "extended" mode, can reach heights of nearly eight foot or more and is the perfect complement to the MAX-Wall Modular Acoustical Environment.
Portable, effective, great looking and highly affordable and since it's stand-mounted, there's no adhesive to worry about and no wall repair to do when moving.
Outstanding broadband absorption, especially at low frequencies
Portable, adaptable and expandable
Easiest and most cost-effective way to control excess low frequencies without giving up large amounts of cubic space