KMR 81 i
Short version of the classic shotgun mic, with switchable filter and pre-attenuation functions. Excellent off-axis (lateral and rear) attenuation. Free of coloration.
The advantage is that a sound source, for example an actor on stage, will not change its apparent tonal balance when moving within this area.
Shotgun microphones are particularly useful in recording situations where a microphone cannot be positioned within the desired distance of the sound source to produce a sufficiently loud signal level.
Typical applications are film and video recordings, where the microphone should not appear in the picture.
The KMR 81 has been specifically designed for electronic news gathering.
In principle, Neumann shotgun microphones use a combination of a pressure gradient transducer and an interference tube. If the wavelength of the frequency is longer than the tube length, the microphones work as pressure gradient transducers. At higher frequencies they operate as interference transducers for lateral sound. Off-axis sound sources are picked up with reduced level, but without coloration.
Therefore, the microphones are well suited to record individual instruments of an orchestra. The pickup areas of several shotgun microphones may even overlap as, for example, during recordings on a large stage, without causing any problem.
The KMR 81 is less sensitive to wind and pop noise when compared to the KM 150 miniature microphone with a similar high directivity. The shotgun microphone features extremely low self noise, good impulse response, and high output level.
The KMR 81 is a shotgun microphones with a very directional characteristic.
The microphone capsule is positioned inside a housing tube that is acoustically open but has a high flow resistance. The directional pattern of the microphone is lobe shaped. The attenuation of lateral sound is practically independent of the frequency. The KMR 81 has a frequency independent directivity within a pickup angle of 90° for audio signals that determine the tonal balance of the program material.
The microphone has a 10 dB attenuation switch to prevent the input of the following unit from overloading.
A second switch activates a 200 Hz high-pass filter. Toward the lower frequencies the sensitivity of the microphone is attenuated by approximately 15 dB at 50 Hz. The frequency range above 200 Hz is unaffected.
The shotgun microphone features very high output capability and a remarkably low self-noise level.
Its low power consumption, light weight, and low sensitivity to wind and handling noise, makes it an ideal tools for news gathering on location.
Small dimensions, together with a balanced center of gravity, make handling easy without any whiplash effect.
However, when on location and during strong wind conditions, we recommend using an additional wind screen (included as standard accessory). The wind screen is made of polyurethane foam.
For mobile use a handle and an elastic suspension are available.
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Interference tube microphone with shotgun directional characteristic |
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Interference/pressure-gradient transducer |
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High lateral and back attenuation |
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90°-recording angle |
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Switchable filter or preattenuation features |
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Extensive accessories for outdoor use |
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Light weight: 145 g |
Technical Data
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Acoustical operating principle |
Interference transducer |
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Directional pattern |
Supercardioid/lobe |
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Frequency range |
20 Hz … 20 kHz |
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Sensitivity at 1 kHz into 1 kohm |
18 mV/Pa |
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Rated impedance |
150 ohms |
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Rated load impedance |
1 kohms |
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Equivalent noise level, CCIR1) |
23 dB |
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Equivalent noise level, A-weighted1) |
12 dB-A |
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Signal-to-noise ratio, CCIR1) (rel. 94 dB SPL) |
71 dB |
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Signal-to-noise ratio, A-weighted1) (rel. 94 dB SPL) |
82 dB |
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Maximum SPL for THD 0.5%2) |
128 dB |
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Maximum SPL for THD 0.5% with preattenuation2) |
138 dB |
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Maximum output voltage |
1.3 dBu |
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Supply voltage (P48, IEC 61938) |
48 V ± 4 V |
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Current consumption (P48, IEC 61938) |
0.8 mA |
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Matching connector |
XLR3F |
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Weight |
145 g |
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Diameter |
21 mm |
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Length |
213 mm |
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Accessories
Adapter Cable AC 22
Adapter Cable AC 25
Adapter Cable AC 27
Auditorium Hanger MNV 21 mt
Auditorium Hanger MNV 87 (mt)
Battery Supply BS 48 i
Battery Supply BS 48 i-2
Boom Attachment M 212 c
Elastic Suspension EA 2124 A mt
Floor Stand MF 5
Microphone Cable IC 3 mt
Power Supply N 248
Stand M 210/1
Stand M 214/1
Stand M 252
Stand Extension STV 4/20/40/60
Stand Mount SG 21 bk
Table Stand MF 2
Table Stand MF 3
Table Stand MF 4
Vertical Bar MZEF 8060/8120
Windscreen WKE 81 Set
Windscreen WS 81
| Color | Nickel, Black |
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Speedy Shipping and professional packaging
Because of our long-standing partnership in a long-standing partnership with UPS, FedEx, DHL and a variety of other world-class carriers, we can provide various shipping options. Our warehouse personnel will pack every item to our exacting specifications. Prior to shipping, your goods are carefully examined and safely secured. We deliver to thousands of clients every day in a variety of countries. The fact that we are committed to becoming the biggest online retailer in the World is clear. We have distribution centers as well as warehouses located in Europe and in the USA.
Note: Orders with more than one item are assigned a processing period in accordance with the item.
Before shipping, we will inspect the ordered items thoroughly. The majority of orders are shipped within 48 hrs. The expected delivery time is between 3 and 7 days.
Returns
The inventory is always changing and we do not completely manage it because multiple stakeholders are involved, including our warehouse and factory. The levels of stock can change at any time. Be aware that it's possible for your order to be out of stock after you have placed the order.
Our policy lasts thirty days. If 30 days have passed since you purchased your item, we will not be able to offer you a return or exchange.
To be returned it must be in its original packaging, unopened and in the condition you received it in. It should also be in the original packaging.
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