A beater holder apparatus for a bass drum pedal enables adjustment of the amplitude of swing of a drum beater with respect to a drum head, comprises a beater holder that is configured to for radial adjustment with respect to the beater shaft. The assembly comprises a support; a shaft supported by the support and rotatable around the axis of the shaft. A pedal is pivotable between an operating position to which the pedal is operated by the operator and a return position. A connecting system connects the pedal to the shaft such that movement of the pedal between the operating and return positions rotates the shaft and rotates the beater head toward and away from the drum head for beating the drum head. The beater holder can be angled infinitely and can be mounted to the pedal's axle to provide a "LIGHT" or "HEAVY" feel to provide a dual adjustment structure. Further, the invention has a clam-shell design for easy change-over to the "LIGHT" and "HEAVY" positions without dismantling the pedal.