For larger rooms (15'x20'x8' or smaller), the Pro Plus is a one-package solution. Studiofoam wedge panels help address mid-high frequency reflection, LENRD bass Traps help smooth low frequency response, and T'Fusors diffuse sound for a wider sweet spot and more natural acoustic control (adhesive included). The Pro Plus acoustic sound control kit is designed primarily for rooms with a floor square footage of 250-400 ft/sq. The shortest room dimension should be 12-16 feet.