Description REMAD Port Protector Inspired by the legendary EVANS EMAD system, the REMAD is an external damping device designed for 4″ microphone ports in bass drum resonant heads. Applying the REMAD ring to the 4″ mic port gives you greater control of your overtones, so you can enhance your pitch, focus, and attack. Every REMAD includes a foam ring that can be applied or removed for additional sound control.