Controlled low-end rumble and a focused attack characterize the EQ3 bass head. Two plies of 6.5mil film with an internal overtone control ring and a removable EQ muffle ring give the head versatility. With a wide dynamic range, the EQ3 produces punch and low-end spread that solidifies the downbeat. The coated version delivers additional warmth, focus, and depth. From the Manufacturer Evans 24" frosted EQ3 two-ply bass head contains an internal overtone control ring with a removable muffle ring for extreme articulation and ultimate endurance. Evans EQ3 series features two plies of 6.5mil film and provides a controlled low-end rumble and focused attack. Its articulation and endurance make the EQ3 especially suitable for live playing and will not distort under heavy hitting. 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.