Part of the D'Addario family, the global leader in musical instrument accessories, the Evans brand is synonymous with quality and consistency. Decades ago, Evans was the pioneer of drumhead manufacturing and design, and today they are the innovators. Designed, engineered and manufactured in the USA, The EMAD series bass drum head is named for the externally mounted adjustable damping system. This system allows each player to control the attack and focus of the drum head by choosing one of two removable foam damping rings. Choosing the thinner foam ring allows for punch and focus without sacrificing resonance, while choosing the wider foam ring maximizes the low end and attack of any bass drum. The EMAD is comprised of a single 10 mil ply and is available in clear, coated, and the Evans Onyx choices in sizes 18" to 26".