Evans EQ4 series features a single ply of 10mil film. A fixed internal overtone control ring focuses the tonal response of the drum. The frosted surface provides a warmer tone. 

Evans EQ4 series features a special, single ply of 10mil film that provides durability and a woody attack that speaks live and in the studio.. The fixed internal ring is proportional to the head size, optimizing control from 18" to 26".