GMAD bass drumheads are ideal for heavy hitters, providing extended life and the ability to hone your tone with EMAD. Made with a single 12mil ply of film, GMAD holds up to heavy-footed drummers while offering the feel, punch, and power of a single ply head. This bass batter has a moderately defined attack, short sustain, and semi-dark tone. GMAD drumheads also feature Level 360 Technology.