Cubes HDG high density graphite
High density graphite. HDG is the best quality of graphite. The graphite material, which is formed of microscopic spheres, has a high capacity for absorbing and dissipation of vibrations. Graphite is a isotropic material. Then the graphite eliminates unwanted vibrations, that have most deleterious effect within the music reproduction chain. This in not Magic, But reality. try for believe.