Exclusive to the Evans line, Hydraulic heads have a layer of oil between the two plies to give you the fat, wet sound that was pioneered in the '70's. The oil acts as a natural muffler to decrease sustain and increase attack without affecting the feel of the head, as internal and external mufflers often do. Hydraulics have a solid attack and a controlled, quick sustain, and are best suited for rock.
SKU Number: *
 "Evans Drum Heads - Evans Hydraulic Glass Drum Heads")