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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: Musical Instruments
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Amazon.com: Evans EMAD2 Clear Bass Drum Head, 20” – Externally Mounted Adjustable Damping System Allows Player to Adjust Attack and Focus – 2 Foam Damping Rings for Sound Options - Versatile for
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