Description
The Neumann KMR 81i is a shotgun microphone for medium distances, e.g. for film dialogue with a clear and focused sound while the microphone is placed outside the picture. Off-axis coloration is minimized to avoid sound change when actors are moving. The KMR 81i offers high sensitivity with low power consumption and is lightweight for easy handling.
The KMR 81i combines a pressure gradient condenser capsule with a medium-length interference tube to achieve a narrow acceptance angle of 90° and excellent rejection of unwanted sound. Unlike many other shotgun microphones the KMR 81i's off-axis sound is picked up at reduced level but without unwanted coloration. This makes it easy to correct a misaligned microphone in postproduction.
The KMR 81i's s frequency response is highly linear up to 2 kHz while a broad treble lift compensates for high frequency losses that occur when recording at greater distances. It also comes in with an incredibly low self-noise of only 12 dB-A and a high sensitivity of 18 mV/Pa, while being able to handle high SPLs of up to 128 dB without audible distortion.
Neumann KMR 81i features
- high directivity with 90° recording angle
- excellent rejection of unwanted sound
- natural sound without off-axis coloration
- low cut and pad switches
- lightweight (145 g)
- low power consumption
Neumann KMR 81i Specifications
| acoustical operating principle: | interference transducer |
| directional pattern: | super-cardioid/lobe |
| requency range: | 20Hz to 20kHz |
| sensitivity at 1kHz into 1 kOhm: | 18 mV/Pa |
| rated impedance: | 150 Ohms |
| rated load impedance: | 1 kOhms |
| equivalent noise level, CCIR: | 23dB |
| equivalent noise level, A-weighted: | 12dB-A |
| signal-to-noise ratio, CCIR (rel. 94dB SPL): | 71dB |
| signal-to-noise ratio, A-weighted (rel. 94dB SPL): | 82dB |
| maximum SPL for THD 0.5%: | 128dB |
| maximum SPL for THD 0.5% with preattenuation: | 138dB |
| maximum output voltage: | 1.3dBu |
| supply voltage (P48, IEC 61938): | 48V (+/-4V) |
| current consumption (P48, IEC 61938): | 0.8mA |
| matching connector: | XLR3F |
| weight: | 145g |
| diameter: | 21mm |
| length: |
213mm |
KMR 81i Polar Pattern
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