Featuring a single-ply 10-mil ultra white film, Powermax™ has a free-floating internal muffling ring to focus attack, pitch and lower frequencies. With a 10-mil dampening underlay and a CS dot applied underneath for added strength, the Powermax™ is the ultimate in Powerful bass with Maximum projection, tone, and control. Discover what champion drum corps, indoor drumlines and top high school and college marching bands have in common. Powermax™: the perfect head right out of the box and onto the field. No assembly required.