Offset impaler increases the sound absorption response of an acoustic panel simply and quickly by introducing a 2? air space. The Impaler features a U-shaped design that elevates the panel from the mounting surface. The Offset Impaler creates a cavity behind the panel that can lower the effective frequency by as much as an octave. The acoustic panels are held in place using a series of sharp protruding darts that penetrate the panel. To secure the panel to the mounting clip, add a dab of adhesive between the impaler face and the back of the acoustic panel.