Amazon.com: Evans EMAD System Pack, 22” (2pc) – Includes Batter Bass Drumhead and Resonant Drumhead -Externally Mounted Adjustable Damping System Allows Player to Adjust Attack and Focus Without Removing Drumhead : Everything Else
Evans 18" Calftone Bass Drum Head 19954189495 | eBay
Evans Hydraulic Black Bass Drumhead - 22 inch | Sweetwater