Dynamic microphone – Sennheiser MD421 The MD 421-II is a professional dynamic microphone from the German company Sennheiser based on the MD 421 model that was first released to the market in 1960 and has since gained recognition as one of the most successful microphones for recording and amplifying almost all types of musical instruments. MD 421-II is built in the same design as the original model with the same metal body and the same capsule that made it one of the most versatile microphones in the world in the eyes of many musicians. With a unidirectional reception texture (Cardioid) the MD 421-II has been widely recognized thanks to its levels of detail, which is reminiscent of the reception of a condenser microphone and is suitable for a variety of uses on stage and in the studio and thanks to the Bass Roll-off function with 5 modes for cutting the low frequencies, the MD 421-II will be an excellent addition to the microphone cabinet of any studio, creator or musician.