The M1b is engineered to control the resonance without sacrificing the brightness of the drum. One M1b has 4 different dampening settings: very light, light, medium damping, to off. Try two M1’s on the same drum for more options and control. Remember the M1 fits any size drum. Dampen in a snap or disengage even faster with the on/off feature. Expressive drum dampening. FLEXIBLE BY DESIGN to match a drummer's natural dynamics. Liven up your white heads with a pop of green!