The Evans BD22EMAD2 Clear Bass Drum Head 22" is a 2-ply head that consists of a 6.5 mm outer ply and a 10 mm inner ply.
The Externally Mounted Adjustable Damping (EMAD2) has boosted low-end frequencies and outstanding durability. Unlike any other two-ply bass heads, the EMAD2 offers two damping rings, each of which affects the head's sound and pedal response. This external system not only maximizes natural attack characteristics and offers tremendous dynamic range (even at low dynamic levels where other damping systems fall far short) and control over sustain, it also allows quick, easy adjustments without having to remove the head from the drum.
Evans EMAD2 Clear Bass Drum Heads are similar to the original EMAD Clear, but this model features two plies of film - 6.5mil and 10mil - that make it even more durable.
This head is versatile, fitting appropriately into any genre that needs a healthy dose of articulation and volume.