Dynamic Microphones: In a dynamic microphone, the audio signal is generated by the motion of a conductor within a magnetic field. In most dynamic mics, a very thin, lightweight diaphragm moves in response to sound pressure. The diaphragm’s motion causes a voice coil suspended in a magnetic field to move, generating a small electric current. Dynamic mics are less sensitive (to sound pressure levels and high frequencies) than condenser mics, and generally can take more punishment. They also tend to be less expensive. Dynamics are perfect for drums and electric guitars. The most popular snare mic of all time is the Shure SM57 (also great on guitar amps). Many engineers swear by the Sennheiser MD421 on toms.