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Neumann KMR81i Short Shotgun Microphone

Short Shotgun (9in) with twist pack case and WS 81

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Description

Meet the KMR 81 I Shotgun Microphone

The KMR 81 i 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 81 i offers high sensitivity with low power consumption and is lightweight for easy handling.

A Problem Solver with a Touch of Class

The KMR 81 i is a shotgun microphone with a high directivity for situations that require the microphone to be kept at a distance from the source. This is often the case in electronic newsgathering (ENG) and film dialogue recording, where the microphone must remain invisible. The KMR 81 i can also be used to obtain a clear and focused sound in noisy environments.

Technically speaking, the KMR 81 i 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 Neumann KMR 81 i’s lobe-shaped pickup pattern is frequency-independent. In other words, off-axis sound is picked up at a reduced level but without unwanted coloration. This makes it easy to correct a misaligned microphone in postproduction.

Compared to other shotgun microphones, the Neumann KMR 81 i offers a more natural sound image. Its 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. The KMR 81 i offers very low self-noise of only 12 dB-A and a high sensitivity of 18 mV/Pa, which can be reduced by 10 dB to protect the microphone input from overload. The KMR 81 i can handle high SPLs of up to 128 dB without audible distortion (138 dB SPL with the pre-attenuation switch engaged). A second switch activates a 200 Hz low cut to compensate for the proximity effect when the KMR 81 i is used at short distances.

Applications

The KMR 81 i is primarily designed for film and broadcast applications. It is an excellent microphone for movie dialogue both in the studio and on location. The KMR 81 i is very lightweight and has a balanced center of gravity, making it a pleasure to use, even after several hours. Due to its low power consumption and its low sensitivity to wind and handling noise, the KMR 81 i is excellently suited for on-location work. Thanks to its natural sound and excellent off-axis behavior, the KMR 81 i can also be used as a problem solver in critical recording situations, e.g. to pick up a soloist in front of an orchestra.

  • 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

DATA & Diagrams

Acoustical operating principle Pressure gradient interference transducer
Directional Pattern Supercardioid/lobe
Frequency Range 20 Hz … 20 kHz
Sensitivity at 1 kHz into 1 kohm 18 mV/Pa ± 1 dB
Rated Impedance 150 ohms
Rated load impedance 1 kohms
Equivalent noise level, CCIR 1 23 dB
Equivalent noise level, A-weighted 2 12 dB-A
Maximum SPL for THD 0.5% 3 128 dB
Maximum SPL for THD 0.5% with preattenuation 4 138 dB
Signal-to-noise ratio, CCIR (re. 94 dB SPL) 5 71 dB
Signal-to-noise ratio, A-weighted (re. 94 dB SPL) 6 82 dB
Maximum output voltage 1.3 dBu
Supply voltage (P48, IEC 61938) 48 V ± 4 V
Current consumption (P48, IEC 61938) 0.8 mA
Matching connector XLR 3 F
Weight 145 g
Diameter 21 mm
Length 213 mm
1) according to IEC 60268-1; CCIR-weighting acccording to CCIR 468-3, quasi peak; A-weighting according to IEC 61672-1, RMS
2) according to IEC 60268-1; CCIR-weighting acccording to CCIR 468-3, quasi peak; A-weighting according to IEC 61672-1, RMS
3) measured as equivalent el. input signal
4) measured as equivalent el. input signal
5) according to IEC 60268-1; CCIR-weighting acccording to CCIR 468-3, quasi peak; A-weighting according to IEC 61672-1, RMS
6) according to IEC 60268-1; CCIR-weighting acccording to CCIR 468-3, quasi peak; A-weighting according to IEC 61672-1, RMS

Additional information

Weight 1 lbs
Dimensions 10 × 2 × 2 in
Choose a Color:

Nickle, Black

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