Amazon.com: Evans EQ Pad Bass Drum Dampeners - Bass Drum Sound Dampening - Attaches to Drum Shell - Adjustable, Hinged - Controls Attack & Sustain - Great for Close Drum Mics -
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