Evans EMAD Coated - Bass Drum Head Review - YouTube
Evans 22" EMAD Resonant Bass Drum Head – Alto Music
EVANS EMAD CLEAR BASS DRUM BATTER HEAD (SIZES 16" TO 26") – Drumazon
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
A Demonstration of the Evans EMAD Bass Batter Head - YouTube