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. tuned high, it will provide ample resonance, but with increased control, articulation, and pitch focus. Contains 1 Evans EQ3 Clear Batter head and 1 EQPAD Two plies of 6.5mil film with an internal overtone control ring and a removable EQ muffle ring EQPAD allows for additional dampening