Evans broke new ground by developing the EC2 batter head, which removes unwanted overtones, focuses pitch, and enhances attack without inhibiting the dynamic range as other damped heads do. Rolls around the toms spread in clean intervals; floor toms groan with presence. The EC2 features an "Edge-Control" ring mounted underneath two plies of 7mil film. By controlling, instead of eliminating, edge vibration, the ring isolates and damps higher overtones, enhancing low-end and attack, and enabling a broader tuning range.
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