Abstract
A rimless drum structure in which a drumhead has a membrane attached to an outer ring and an adjustment ring is disposed beneath the membrane within the outer ring. Tuning devices are spaced around the rings and are adjustable to urge the inner ring against the underside of the membrane, and thereby varying the tension and the tuning of the membrane. Two of such drumheads may be assembled in opposing fashion through the use of a plurality of rigid spacer members attached between the brackets of the upper and lower drumheads. An adjustable snare device having a cam type quick release mechanism and a snare tension adjustment device, may be mounted on the dual headed assembly. Sound control devices having bumpers exerting an adjustable amount of force on the upper drumhead membrane may also be used and these devices may be moved to positions at variable distances from the center of the drumhead to vary the sound effect.
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