Fast bass damping adjustment without head removal.
The Evans EMAD Clear batter drum head comes with 2 damping rings, each of which affects the head's sound and pedal response. EMAD stands for Externally Mounted Adjustable Damping and this external system maximizes natural attack characteristics. It offers tremendous dynamic range (even at low dynamic levels where other systems fall short). The Evans drum head also allows quick, easy adjustments without having to remove the head from the drum—an especially valuable feature during recording sessions. Evans EMAD bass drum heads come in 18", 20", 22" and 24" sizes.