Sennheiser MD421 II Cardioid Dynamic Microphone with Five Position Bass Rolloff SwitchThe Sennheiser MD 421 II is a cardioid, dynamic microphone popularized by the recording and broadcast industry. The MD 421 II is favored for it's ability to handle a variety of applications due to it's flexible bass control. The microphone features a 5 position bass roll off switch and frequency response of 30 17,000 Hz. The cardioid polar pattern effectively rejects off axis noise due to room acoustics and noise. The cardioid pattern also provides