The Min-EMAD (Externally Mounted Adjustable Damping) suppresses unwanted overtones, but retains the desired attack, tone, and feel. By linking the vibrating head with the counterhoop, the Min-EMAD removes frequencies by resisting the motion of the head.

Evans Min-EMAD (Externally Mounted Adjustable Damping) suppresses unwanted overtones, but retains the desired attack, tone, and feel. By linking the vibrating head with the counter hoop, the Min-EMAD removes frequencies by resisting the motion of the head.
Evans E-Rings are easy to use external overtone control rings that "float" on the surface of a drum head. They remove unwanted overtones and flatten the drum head's sound, allowing for easier tuning.
For over 40 years, Evans has been a pioneer of drum head manufacturing and design. Known for innovative designs such as EMAD, EC2S, and the Hydraulic series, Evans drum heads are made in the USA in a state of the art manufacturing facility. Acquired in 1996 by D'Addario and Company, the global leader in musical instrument accessories, the Evans brand is synonymous with quality and consistency.