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Product Information
KMR 81/82 i
Shotgun
Microphones
www.neumann.com
Georg Neumann GmbH, Berlin • Ollenhauerstr. 98 • 13403 Berlin • Germany • Tel.: +49 (30) 417724-0 • Fax: +49 (30) 417724-50
E-Mail: headoffice@neumann.com, engineering@neumann.com, catalog-info@neumann.com • Web: www.neumann.com
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he KMR 81 and KMR 82 are shotgun
microphones with a high directivity that remains within the acceptance angle independent of the frequency.
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.
Applications
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 82 is very often
used on stage. The KMR 81
has been specifically designed for electronic
news gathering.
Acoustic features
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
Features
• Interference tube microphones
with shotgun directional
characteristic
• Interference/pressure-gradient
transducer
• High lateral and back
attenuation
• 90°/45°-recording angle
• Switchable filter or preattenuation features
• Extensive accessories for
outdoor use
• Light weight: 145 g/250 g
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 and KMR 82 are less sensitive
to wind and pop noise when compared to the
KM 150 miniature microphone with a similar
high directivity. Both shotgun microphones feature extremely low self noise, good impulse response, and high output level.
Polar pattern
KMR 81 and KMR 82 are 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 patterns of the
microphones are lobe shaped.
The attenuation of lateral
sound is practically independent of the frequency.
The KMR 82 has a frequency
independent directivity within
a pickup angle of 45° for audio
signals that determine the tonal balance of the program material. For the KMR 81, this
angle is 90°.
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KMR 81/82 i
Filter and attenuation KMR 81 i
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.
Filter KMR 82 i
Between 2 kHz and 15 kHz the KMR 82 has
a boost to compensate for HF transmission losses in air when recording distant sound sources.
This may overemphasize any
sibilance if the microphone is
used close-up.
Use on location
The shotgun microphones feature very high
output capability and a remarkably low selfnoise level.
Their low power consumption, light weight,
and low sensitivity to wind and handling
noise, make them 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 and also serves as soft padding of
the microphone in its leather carrying case.
For mobile use a handle and an elastic suspension are available.
Therefore, a two-position slide
switch allows to select the
setting that is best for balanced
upper frequencies.
The KMR 82 has a high-pass
filter to suppress subsonic interference. The cutoff frequency may be raised
to 120 Hz (–3 dB) with a built-in two-position
slide switch.
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KMR 81 i KMR 82 i
KMR 81 i
measured in free-field conditions (IEC 60268-4), tolerance ±2 dB
Application Hints
• Recordings for
- broadcasting/ENG,
- film and video productions
• Medium length shotgun spot mic in noisy
surroundings
• Balanced weight during handheld and boom/
fishpole operation
These are just some of the most common applications. We recommend additional experimentation
to gain maximum use from this microphone.
Delivery Range KMR 81 i
Microphone KMR 81 i (mt), Windscreen WS 81,
Leather carrying case
Delivery Range KMR 82 i
Microphone KMR 82 i (mt), Windscreen WS 82,
Leather carrying case
Catalog No.
KM R 8 1 i ...................................................... ni .......... 006961
KMR 81 i mt ...............................................blk ....... 006962
KM R 8 2 i ...................................................... ni .......... 006878
KMR 82 i mt ...............................................blk ....... 006879
KMR 82 i
Technical Data KMR 81 i KMR 82 i
Acoustical operating principle ................................. Interference transd. ..... Interference transd.
Directional pattern .................................................................. Supercard./lobe ............. Supercard./lobe
Frequency range .................................................................... 20 Hz...20 kHz........... 20 Hz...20 kHz
Sensitivity at 1 kHz into 1 kohm .............................................. 18 mV/Pa ......................... 21 mV/Pa
Rated impedance .............................................................................. 150 ohms ........................ 150 ohms
Rated load impedance ................................................................ 1000 ohms.....................1000 ohms
Signal-to-noise ratio, CCIR1) (rel. 94 dB SPL) ............................... 71 dB .................................7 1 dB
Signal-to-noise ratio, A-weighted1) (rel. 94 dB SPL) ................. 8 2 dB ................................. 82 dB
Equivalent noise level, CCIR1)............................................................... 23 dB ................................. 23 dB
Equivalent noise level, A-weighted1).............................................. 12 dB-A ............................ 12 dB-A
Maximum SPL for THD 0.5%2)...................................................... 128 dB .............................. 128 dB
Maximum SPL for THD 0.5% with preattenuation2)......... 138 dB ................................... -
Maximum output voltage ................................................................. 900 mV ..........................1050 mV
Dyn. range of the mic. amplifier (A-weighted) ........................ 116 dB .............................. 116 dB
Supply voltage (P48, IEC 61938) ......................................... 48 V ± 4 V ....................... 48 V ± 4 V
Current consumption (P48, IEC 61938) .................................... 0.8 mA ...............................0.7 mA
Matching connector ................................................................................ XLR3F ............................... XLR3F
Weight .............................................................................................................. 14 5 g ................................. 250 g
Diameter ...................................................................................................... 21 mm .............................. 2 1 mm
Length .......................................................................................................... 226 mm ........................... 395 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)
measured as equivalent el. input signal
Selection of Accessories
Battery supply, BS 48 i ........................ blk ....... 006494
Power supply, N 248 EU .................. blk ....... 008537
Power supply, N 248 US ................... blk ....... 008538
Power supply, N 248 UK .................. blk ....... 008539
Stand mount swivel, SG 82 .............. blk ....... 006616
Handle, HG 82 ......................................... blk ....... 006856
Auditorium hanger, MNV 21 mt ... blk ....... 006802
Elastic suspension, EA 82 ................. ni .......... 006846
Elastic suspension, EA 82 mt ......... blk ....... 006848
Microphone cable, IC 3 mt ................ blk ....... 006547
for KMR 81 i only:
Windscreen, WK 81 .............................. g r .......... 007275
Elastic suspension,
EA 2124 A mt ........................................... blk ....... 008433
for KMR 82 i only:
Windscreen, WK 82 .............................. gr .......... 006855
A complete survey and detailed descriptions of all
accessories are contained in the accessories catalog.
Meaning of color codes:
blk= black; ni = nickel; gr = grey
Errors excepted, subject to changes • Printed in Germany • Publ. 01/08 058162/A05
Neumann is a registered trademark of the Georg Neumann GmbH in certain countries.
®
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