General purpose replacement motors designed for audio drive equipment. Truly universal motors whose features include universal mounting, easy speed adjustment via a preset potentiometer accessible through the bottom, lower wow and flutter, longer life, less vibration plus a standard spindle diameter allowing you to use the original pulley. Simply fit motor and adjust for correct speed. Simple,convenient, quick and reliable. These motors use solid state speed control. DO NOT reverse the input voltage polarity as damage to the electronic regulator will result and therefore, not be covered under warranty.