The Classic Evo sub-platter upgrades all older The Classic and The Classic SB SuperPack turntables to the same standard as The Classic Evo. The diamond cut aluminium sub-platter has been machined to much improved and higher tolerances than the version supplied with earlier models and will be a substantial upgrade to those sub-platters. It adds more mass to the entire platter and drive system resulting in additional damping of noise and unwanted resonances. The improved tolerances during production will increase overall speed accuracy the additional mass improves short term speed stability.