Evans Hydraulic drumheads are the only heads on the market with a thin layer of oil between two plies of film to suppress unwanted overtones. Known for a fat, deep, short sound reminiscent of early rock n roll. Hydraulics’ unique translucent frost coating delivers additional warmth, focus, and depth. | All Evans drumheads feature Level 360 Technology to provide ease of tuning, extended pitch range, and optimum quality of sound. All Evans drumheads are designed, engineered, and manufactured in the USA. |