The Sennheiser MD431 II is a handheld supercardioid dynamic microphone offering an extended frequency response for reproduction of vocals and speech in concert venues, public address, houses of worship, and live stage applications. Its dynamic element requires no power source and delivers a frequency response of 40 Hz to 18 kHz. The supercardioid polar pattern excels at rejecting sound at its off-axis points, yielding enhanced immunity to feedback and low off-axis coloration. A hum-compensating coil aids in keeping extraneous electrical noise to a minimum.