Sunbursts Broadband Absorbers are a proprietary Auralex product and are truly one of a kind! They feature a smart and unique male/female configuration that helps solve quite a wide range of acoustical problems. Because they offer a significant amount of both low frequency control in particular & broadband absorption overall, they work well in rooms that don't have corners available for treatment with LENRDs or where you don't need or desire large expanses of absorbent wall or ceiling treatment. Sunburst Female acoustic broadband absorbers are often cut in half and used as "mini-LENRDs" or to frame Studiofoamed areas. They look great and deliver truly linear broadband performance!