Sennheiser MD 421
Microphone by Sennheiser
The Sennheiser MD 421 is a German large-diaphragm cardioid dynamic microphone introduced in 1960, built with a 27mm capsule and a five-position bass roll-off filter that made it equally at home in broadcast studios and live concert stages. It has a wide frequency response of 30 to 17,000 Hz, handles very high sound pressure levels, and has been used extensively on guitar amplifiers, drum kits, and brass instruments across decades of professional recording.
Specifications
| Type | Dynamic (moving-coil) |
| Polar Pattern | Cardioid |
| Frequency Response | 30 Hz - 17,000 Hz |
| Sensitivity | 2 mV/Pa (at 1 kHz) |
| Dimensions | 215 x 46 x 49 mm |
| Weight | 354 g |
| Connections | 3-pin XLR |
| Notes | 5-position bass roll-off filter (M = full response, S = speech/low-cut); nominal impedance 200 Ω (350 Ω measured); large 27 mm diaphragm; handles very high SPL |
