Experience the difference. SMT drum heads are a pre-muffled design featuring Sub Muff’l Technology® (SMT) constructed with an externally mounted dampening profile and free-floating acoustic foam, enabling the drum head and drum shell to maintain full sound characteristics with additional attack and low-end frequencies. SMT allows a broad tonal spectrum of tuning ranges with controlled high and mid frequencies, and deep, powerful low tones. A new industry standard and one of the market’s most musical and versatile pre-muffled drum heads. Ideal for live and recording applications. The ultimate solution for drummers seeking power, control and versatility.