Les Davis Audio 3D²--These small metallic discs use constrained layer damping technology to suppress vibrations throughout your hifi system. Simply place them underneath component feet, under power supplies and motor, and even between speakers and stands. 3D² discs will reduce the noise floor in your system so that more music will flow from your speakers and into your head. Everyone who tries them hears a remarkable improvement in their systems when they use 3D². Best of all, they're affordable so anyone can try them out!