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MD 21U Documentation
Sennheiser Electronics Corporation MD 21U
Omnidirectional Dynamic Microphone
The Sennheiser MD 21 U is an omnidirectional handheld/desktop dynamic microphone, intended for news gathering and broadcast. It is one of Sennheiser’s classic dynamic mics, dating to 1953.
The mic has a wide frequency range, with a flat response from 60Hz–1500Hz and a smooth +6dB presence boost centered at 8kHz. The mic’s response rolls off rapidly below 50Hz and above 15kHz.
The mic’s polar pattern is omnidirectional below 1kHz, with a narrowing response at higher frequencies.
The original MD21, demonstrated at the Industrial Fair in Hanover in 1954, had a “hammertone” gray finish. The mic has changed over the years, both cosmetically and in the construction of the moving-coil cartridge.
In 2004, in celebration of the microphone’s 50th anniversary, Sennheiser released a limited edition of 100 MD21 mics, finished in the original hammertone gray, with the signature of Prof. Dr. Fritz Sennheiser on the side.
The MD 21 U ships with an integrated hard mount.
The Sennheiser Electronics Corporation MD 21U is also known as: MD21U, MD21, MD21HN.
The mic was released in 1953.
Specifications
| Pickup Patterns | Pads & Filters |
|---|---|
|
Omnidirectional
(1.8 mV/Pa; 40 - 18,000 Hz) |
|
| Coil Diameter | Impedance | SPL/Noise |
|---|---|---|
| n/a | 200 Ohms (Low) | SPL n/a |
| Weight | Length | Max Diameter | Interface(s) |
|---|---|---|---|
| 280g (9.88oz) | 137mm (5.39'') | 67mm (2.64'') |
|
| Power Specifications |
|---|
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