A Demonstration of the Evans EMAD Bass Batter Head - YouTube
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 EMAD System Fell-Set für Basstrommel
Evans 22" BD22EMAD Clear Bass Drum Head
Evans EMAD-2 Clear 18" Bass Drum Head « Bass-Drum-Fell