Sennheiser MD 421 II Cardioid Dynamic Microphone

The Sennheiser MD 421-II Microphone is a cardioid, dynamic microphone popularized by the recording and broadcast industry. The MD 421-II is favored for its ability to handle a variety of applications due to its flexible bass control. The microphone features a 5-position bass roll-off switch and frequency response of 30 to 17,000 Hz. The cardioid polar pattern effectively rejects off-axis noise due to room acoustics and noise, and also provides effective feedback rejection often caused by monitors positioned within close proximity.

The MD 421-II features a dynamic capsule, allowing even signal response whether close-up or at a reasonable distance. This is particularly useful for broadcast applications, where announcers and DJs can refrain from remaining absolutely stationary. The MD 421-II also handles very high sound pressure levels, making it suitable for miking instruments high in transient (peak) response.

Sennheiser MD421 II Features

• Rugged professional microphone
• Five position bass roll-off switch
• Effective feedback rejection
• Clear sound reproduction
• Easy handling due to pronounced directivity

• MD421 II Cardioid Microphone1
• Microphone clamp for 3/8" thread1

• Transducer TypeDynamic
• Polar PatternCardioid
• Frequency Response30 Hz - 17 kHz
• Output Impedance200 ohms
• Sensitivity2.0 mV/Pa (-54 dBV) ±2.5 dB
• Connector3-Pin XLRM
• Dimensions
  • Height: 215 mm
  • Diameter: 49 mm
  • Net Weight: 385g

About Dynamic Microphones at Sound Productions

If you’re looking for an all-purpose, heavy-duty microphone, look no further than a dynamic microphone. Equally outstanding in both the studio and live on stage, dynamic mics are an affordable, versatile, and classic option for nearly every miking application. Popular uses include live performances, studio recordings, man-on-the-street style interviews, as well as podcasts that aim for a professional “radio voice” polish.

Dynamic microphones work using a coil attached to a magnet. When sound waves cause the coil to vibrate up and down against the magnet, an electromagnetic current is induced; in simple terms, this turns the sound into an electronic signal to be channeled into a recorded version or—in the case of live sound—into a speaker to distribute the sound to the audience.