Musical Fidelity - Roundtable (Black) Nominal speed 33/45 rpm, outside belt drive system, manual speed change - Speed Variance 33rpm:  0.30 %, 45rpm:  0.20 % Wow and flutter 33rpm:  0.10%, 45rpm:  0.09%-Signal to noise ratio Mechanical noise: 39 dB-Effective tonearm mass 14g