Damp-IT was developed to work with speakers, turntables, CD players and tube amplifiers, as well as other components that may be sensitive to vibrations or positioned on glass, metal or thin wood platforms. Made of a high-tech synthetic rubber material, the feet effectively dampen a wide frequency range from infrasonic-levels to 500 Hz. When Damp-IT is installed you can play your system up to 30% louder without the risk of acoustic feedback.