Product Information
KM 100
Miniature
Microphone System
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
he variable condenser miniature microphone system consists of several active microphone capsules with different directional
characteristics, an output stage, and numerous accessories.
Currently there are seven active capsules available: omni
diffuse-field equalized, omni
free-field equalized, cardioid,
wide-angle cardioid, cardioid
with bass roll-off, hypercardioid, and figure-8.
Through the modular construction of mic capsules and
the output stage it is very
easy to adapt the system to a
wide range of applications.
The mic becomes nearly invisible during work with cameras (film, video), on stage, or
suspended from the ceiling in
a concert hall.
An active capsule can also be
screwed directly onto the output stage. The result is a compact miniature microphone.
Features
• Miniature microphones with 7
exchangeable capsules
• Active capsules, detachable up
to 50 m from the output stage
• Great variability through
capsule extensions and
goosenecks
• Switchable 10 dB preattenuation
• Set includes windshield and
two different clamps
• Transformerless circuitry
• Extensive accessories
Construction
The microphones are only 92 or 110 mm resp.
long and 22 mm in diameter. They consist of
the condenser capsule and the output stage.
Both parts can be unscrewed from each other.
The system offers several condenser capsules
with different directional characteristics.
Numerous accessories can be
mounted between the capsules and the output stage.
The capsules attach to cables,
capsule extensions, swivel
mounts, table stands, goosenecks, stereo mounts, and
hangers. Therefore, it is very
easy to adapt the system to a
wide range of applications.
The active capsule itself is
only 35 or 47 mm resp. long.
The KM 100 output stage and
the active microphone capsule may be separated by up to 50 m of interconnecting cable.
These cables are 3 mm in diameter, and therefore very inconspicuous.
Acoustic features
AK 20 is a pressure gradient transducer with
the figure-8 characteristic, realized with a single diaphragm. The diaphragm diameter is just
16 mm. All sound field components reach the
diaphragm directly. This results in identical frequency response curves and output levels at
0° and 180° sound incidence. Corresponding
accessories allow combining the AK 20 with
other active capsules or microphones to obtain
an MS-Stereo setup.
AK 30 is a diffuse-field equalized pressure
transducer with a flat frequency response up
to 10 kHz (in the diffuse field). In the free
sound field this microphone has a boost of approximately 7 dB at 10 kHz.
KM 100
AK 31 is a free-field equalized pressure transducer with a flat frequency response up to
20 kHz (in the free field). In the diffuse sound
field this microphone has a high frequency rolloff above 5 kHz.
AK 40 is a pressure gradient transducer with
cardioid characteristic. The frequency curves
are very smooth and match 0° sound incidence.
Sound from sources within a pickup angle of
± 135° is reproduced without any coloration.
AK 43 is a pressure gradient transducer with
wide-angle cardioid characteristic. Attenuation at 90° is 4 dB, at 135° it is 8 dB and at
180° it is 11 dB. The frequency response curves
for sound sources within an angle of ± 90° are
parallel up to 12 kHz.
AK 45 is a pressure gradient transducer with
cardioid characteristic, similar to the AK 40.
However, it has an acoustic bass roll-off that
is useful during applications when subsonic
and low frequencies may cause difficulties.
The AK 45 is optimized for a flat low frequency response at a recording distance of 15 cm
(“speech cardioid”).
AK 50 is a pressure gradient transducer with
hypercardioid characteristic. Attenuation of
sound incidence from the side or rear is about
10 dB, with minimum sensitivity at an angle of
120°.
Electrical features
Even with a long cable between active capsule
and output stage, the signal is immune to external interference.
Preattenuation
The output stage has a 10 dB
switch. Attenuation is achieved
by reducing the capsule voltage
to one third.
When the switch is on, the
microphone is capable of accepting sound pressure levels
up to 150 dB without being
overloaded.
Connectors
To diminish the number of connectors within
the KM 100 System some accessories were
modified. They can now be screwed directly
onto the KM 100 output stage without using
the KA 100 cable adapter. The new accessories which include the cable adapter, were renamed adding the suffix KA. For example:
LC 3 is now LC 3 KA.
The separate KA 100 cable, needed for older
accessories, will be available also in future.
The KM 100 output stage has a 3-pin XLR
connector.
The KM 100 is phantom powered (48 V) and
uses transformerless output circuitry. This has
several advantages. It features high output capability and extremely low self noise. It provides
exceptionally clean sound, free
of any coloration. As with traditional transformers, this circuit approach ensures good
common mode rejection. The
balanced output signal is protected against interference.
The construction is extremely
compact. The entire microphone circuitry is on a single hybrid module measuring only
2 cm² in area. It is built into the
microphone capsule, therefore
the term “active capsules”.
All sensitive components are
protected within the capsule. As a result, the
quality of the audio signal is never compromised
through the use of accessories, for example,
when the capsule is detached from the output
stage and mounted on a cable or a gooseneck.
Sound diffraction sphere
The SBK 130 sound diffraction sphere slips
onto the front of the KM 130/KM 131 pressure microphones. The diaphragm becomes an
integral part of the surface of the sphere. This
affects the frequency response of the microphones.
While sounds coming from the front-half
space are emphasized by up to 2.5 dB between
2 kHz and 10 kHz, sounds arriving from the
rear-half space are attenuated by a maximum
of 2.5 dB in the range above 5 kHz.
Since the sound diffraction sphere causes the
pressure buildup of the KM 130/KM 131 pressure microphones to begin earlier, the frequency response rises smoothly in the middle and
upper range. This is similar to a typical pressure gradient microphone, where the directivity increases with rising frequencies. However, since the KM 130/KM 131 are pressure
microphones, they maintain a linear sensitivity down to the lowest frequencies.
This changing directivity allows to record at a
greater distance from the sound source, and
makes the KM 130/KM 131 microphones especially suited as stereo main microphones in
A-B configurations.
KM 100 F Output stage
The KM 100 F output stage is an alternative
to the KM 100 output stage. In contrast to the
KM 100 output stage with a flat frequency
response, the KM 100 F attenuates frequencies
below 80 Hz at 6 dB/octave. This eliminates
or suppresses interference caused by wind or
structure-borne noise.
A built-in slide switch allows to raise the cutoff frequency (-3 dB point) from 80 Hz to
120 Hz. An additional slide switch lowers the
sensitivity by 10 dB.
KM 100
Stereo recordings
By means of the AC 30 adapter cable two active capsules, AK 20 and e.g. AK 40 can be
connected as MS stereo pair directly with the
MTX 191 (A) matrix amplifier. The XY or
MS signal is then available at the 5-pin XLR
output connector of the MTX 191 (A), and
the recording angle can be electrically remote
controlled. The output stages KM 100 are then
not required.
Stereo set
The cardioid and hypercardioid microphones
are also available as complete stereo sets,
SKM 140 and SKM 150, including all accessories in a single jeweler's box.
A further SKM 100MS Stereo Set containing the microphones KM 120 and
KM 140 is available.
5
Current:
New:
Accessories*
KM 100 Output stage
KM 100 Output stage
KA 100 Cable adapter
LC 3 Microphone cable
LC 3 KA Microphone cable
AK 20, Active capsule
Catalog No.: 71659
AK 45, Active capsule
Catalog No.: 69015
SBK 130, Sound diffraction sphere
for dia. 22 mm,
Catalog No.: 07371
AK 30, Active capsule
Catalog No.: 69001
AK 50, Active capsule
Catalog No.: 69016
BS 48 i, Battery supply
Catalog No.: 06494
AK 31, Active capsule
Catalog No.: 69002
KA 100, Cable adapter
Catalog No.: 07330
BS 48 i-2, Battery supply
Catalog No.: 06496
AK 40, Active capsule
Catalog No.: 69007
KM 100, Output stage
Catalog No.: 07395
N 248, Power supply
EU: Catalog No.: 08537
US: Catalog No.: 08538
UK: Catalog No.: 08539
AK 43, Active capsule
Catalog No.: 69014
KM 100 F, Output stage
Catalog No.: 07376
IC 3 mt, Microphone cable
Catalog No.: 06543
Extension cable
LC 2, 10 m, Catalog No.: 06690
90
Microphone cable
LC 3 KA, 5 m, Catalog No.: 08408
LC 3 KA, 10 m, Catalog No.: 08409
*) Detailed descriptions of all accessories are contained in the accessories catalog.
DS 21 mt, Double mount
Catalog No.: 06798
DS 100-1, Double swivel mount
(for KVF ... extension tubes)
Catalog No.: 08491
DS 120, Double mount
Catalog No.: 07343
AK .. Active capsule
AK .. Active capsule
KM 100
EA 2124 A mt,
Elastic suspension
Catalog No.: 08433
MF 2, Table stand
(with rubber mounted thread)
Catalog No.: 07266
KVF 118 KA, Capsule extension
(with gooseneck, 300 mm)
Catalog No.: 08410
MF 3, Table stand
Catalog No.: 07321
KVF 158 KA, Capsule extension
(with gooseneck, 700 mm)
Catalog No.: 08411
MF 4, Table stand
Catalog No.: 07337
KVFF 148 K A, Capsule extension
(with double gooseneck, 700 mm)
Catalog No.: 08412
MF 5, Table stand
Catalog No.: 08489
MA, Microphone fishpole
Catalog No.: 06771
MF-AK Table Stand
(with Swivel Joint)
Catalog No.: 08453
SG 100, Swivel mount (for KVF ...)
Catalog No.: 06688
MNV 21 mt
Auditorium hanger
with clamp for KM ...
Catalog No.: 06802
SG 100-1, Swivel mount
Catalog No.: 08490
*) Detailed descriptions of all accessories are contained in the accessories catalog..
MNV 87 mt, Auditorium hanger
(with threaded adapter)
Catalog No.: 06806
SG-AK Swivel Mount
Catalog No.: 08452
MNV 100, Auditorium hanger
(with clamp for AK ...)
Catalog No.: 06811
SGE 100, Swivel mount for MF 2
(with rubber mounted thread
for AK ...)
Catalog No.: 06742
SG 21/17 mt Swivel mount
(with 21 mm and 17 mm clamp)
Catalog No.: 06149
SMK 8 i, Gooseneck
Catalog No.: 06181
91
Accessories
SMK 100 KA, Gooseneck
(with cable, 160 mm)
Catalog No.:08413
Stand extension
STV 4, Catalog No.: 06190
STV 20 , Catalog No.: 06187
STV 40, Catalog No.: 06188
STV 60, Catalog No.: 06189
SMK 100-2 KA, Double gooseneck
(with cable, 160 mm)
Catalog No..: 08414
TF 221 c, Table flange
(with rubber mounted thread)
Catalog No.: 07278
PS 15, Pop screen
Catalog No.: 08472
Windscreen, 45 mm
WNS 100 blk., Cat. No.: 07323
WNS 100 red, Cat. No.: 07324
WNS 100 grn, Cat. No.: 07325
WNS 100, yel, Cat. No.: 07326
WNS 100, blu, Cat. No.: 07327
Special Accessories for AK 20 and Stereo-Applications
STH 100, Stereo mount
(for 2xAK ... with LC 3)
Catalog No.: 07315
WS 100, Windscreen, 90 mm
Catalog No.: 06751
SR 100, Stand tube
Catalog No.: 07336 and
KA 100, Catalog No.: 07330
DA-AK, Elastic suspension
for two AK ...
Catalog No.: 08419
WJ-AK, Windjammer
for WKD-AK
Catalog No.: 08425
DA-KM, Elastic suspension
for two KM ...
Catalog No.: 08420
WJ-KM, Windjammer
for WKD-KM
Catalog No.: 08426
WKD-AK, Windscreen
for DA-AK
Catalog No.: 08423
WNS 120, Windscreen
for AK 20
Catalog No.: 08427
WKD-KM, Windscreen
for DA-KM
Catalog No.: 08424
AC 30, Adapter cable for connec-
tion of 2 AK ... with MTX 191 (A),
Catalog No.: 08418
STH 120, Stereo mount
for AK 20 and e.g. AK 40
Catalog No.: 08422
MTX 191 A,
Matrix amplifier
Catalog No.: 07331
KM 100
Application Hints
For recording situations where the microphone
must remain “invisible”.
KM 120
• MS-Stereo microphone (in combination with
the KM 140)
• Two crossed AK 20s in Blumlein technique
• Inconspicuous spot microphone with optimum
attenuation of lateral sound sources
• Single microphone for two speakers
facing each other
KM 130
• Ideal as AB stereo pair in the diffuse sound field
because of the flat frequency response
• As a main mic, especially for capturing room
acoustics
• For stereo recordings with a baffle plate
• As a spot mic for piano, wind instruments,
organ, and choir
KM 131
• For close miking of instruments when there
is no need to attenuate extraneous noise,
and in a balanced acoustic environment to
record acoustic guitar, wind instruments,
strings, percussion, and drums
• Flat frequency response for close miking, spot mic
KM 140
• Universal usage, especially in situations
when it is necessary to attenuate sound
coming from adjacent instruments
• As XY and ORTF stereo pair
• Announcer’s mic for broadcasting
• Spot mic, overhead
• Close miking of strings, wind instruments,
percussion, piano, Leslie speakers,
guitar amps
• We recommend using an additional
windscreen to minimize the effects
of high wind velocity
KM 143
• Polar response characteristic acts more
like an omni. Therefore, it is an ideal tool
to record larger instrument ensembles
• As AB stereo pair, especially in rooms
with less than ideal acoustics
• As spot mic for strings, wind instruments,
percussion, and Leslie speakers
• Acts very neutral when used close up
to bass instruments, such as
double bass, bass amps, guitar amps
KM 145
• It naturally compensates for proximity effect
• Very neutral tonal balance during close
miking of speech, as in TV, movie and video ,
PA
• Acts very neutral when used close up to bass
instruments, such as double bass, bass amps,
guitar amps, Leslie speakers, toms
KM 150
• As XY stereo pair
• Overhead, toms
• In situations that are susceptible to acoustic
feedback
• To attenuate unwanted sound of nearby
instruments
• Recording of speech, as in TV, movie and video
productions, PA systems
• Produces especially warm and bass supporting
sound for artists who perform in proximity
effect range
• We recommend using an additional windscreen to minimize the effects of high wind
velocity, and plosive sounds
These are just some of the most common
applications. Detailed hints are described in the
catalog “KM 100 Application Guide”.
Delivery Range KM ...
Microphone KM 120 ... KM 150
Windscreen WNS 100 or WNS 120
Stand mount swivel SG 21/17
Wooden box
Delivery Range SKM 140 (150)
2x Microphones KM 140 (150)
2x Connecting cables LC 3 KA
1x Stereo mount STH 100
Wooden box
Delivery Range SKM 100-MS
1x Microphone each KM 120 and KM 140
2x Connecting cables LC 3 KA
1x Stereo mount STH 120, Wooden box
Catalog No.
KM 12 0 .......................................... blk ...................... 008417
KM 13 0 .......................................... blk ...................... 007051
KM 131 .......................................... blk ...................... 007061
KM 14 0 .......................................... blk ...................... 007031
KM 14 3 .......................................... blk ...................... 007109
KM 14 5 .......................................... blk ...................... 007068
KM 15 0 .......................................... blk ...................... 007077
SK M 1 40 ....................................... blk ...................... 007094
SK M 1 50 ....................................... blk ...................... 007099
SKM 100-MS .............................. blk ......................008421
KM 120
KM 130
KM 131
measured in free-field conditions (IEC 60268-4), tolerance ±2 dB
KM 140
KM 143
KM 145
KM 150
KM 130 with
SBK 130
KM 131 with
SBK 130
KM 100
Technical Data KM 120 KM 130 KM 131 KM 140 KM 143 KM 145 KM 150
Acoustical operating principle ...................... Press. grad. ................ Pressure ................Pressure ......... Press. grad. .......... Press. grad. ......... Press. grad. ......... Press. grad.
Directional pattern ....................................................... Side-fire....................... Omni ....................... Omni ................ Cardioid................. Cardioid .................Cardioid .................. Hyper-
Frequency range ........................................................ 20 Hz to ............. 20 Hz to ............. 20 Hz to .............20 Hz to ............. 20 Hz to ............. 20 Hz to ............. 20 Hz to
Sensitivity at 1 kHz into 1 kohm .................. 12 mV/Pa ............ 12 mV/Pa ............12 mV/Pa ............15 mV/Pa ............ 15 mV/Pa ............ 14 mV/Pa ............ 10 mV/Pa
Rated impedance ....................................................... 50 ohms .............. 50 ohms .............. 50 ohms .............. 50 ohms ............... 50 ohms .............. 50 ohms .............. 50 ohms
Rated load impedance ..................................... 1000 ohms ....... 1000 ohms ....... 1000 ohms ....... 1000 ohms ........ 1000 ohms........ 1000 ohms ....... 1000 ohms
Signal-to-noise ratio
CCIR1) (rel. 94 dB SPL) .................................................. 68 dB ..................... 67 dB .....................69 dB .................... 69 dB ..................... 69 dB ..................... 68 dB ..................... 67 dB
A-weighted1) (rel. 94 dB SPL) .............................. 76.5 dB .....................78 dB .....................78 dB .................... 78 dB..................... 78 dB ..................... 77 dB .....................76 dB
Equivalent noise level, CCIR1).................................... 26 dB ..................... 27 dB .....................25 dB .................... 25 dB ..................... 25 dB ..................... 26 dB ..................... 27 dB
Equivalent noise level, A-weighted1)........... 17.5 dB-A ............... 16 dB-A ............... 16 dB-A ............... 16 dB-A................ 16 dB-A ............... 17 dB-A ............... 18 dB-A
Maximum SPL
for THD 0.5%2)............................................................... 140 dB ................. 140 dB ................. 140 dB ................. 138 dB ................. 138 dB ................. 138 dB ................. 142 dB
for THD 0.5% with preatt2)................................... 150 dB ................. 150 dB ................. 150 dB ................. 148 dB ................. 148 dB ................. 148 dB ................. 152 dB
Maximum output voltage ......................................... 10 dBu ................. 10 dBu ................. 10 dBu ................. 10 dBu .................. 10 dBu .................. 10 dBu ................. 10 dBu
Dynamic range of the mic amp
(A-weighted) .................................................................122.5 dB ................. 124 dB ................. 124 dB ................. 122 dB ................. 122 dB ................. 121 dB ................. 124 dB
Supply voltage (P48, IEC 61938) ............ 48 V ± 4 V .........48 V ± 4 V ........ 48 V ± 4 V ........ 48 V ± 4 V ......... 48 V ± 4 V .........48 V ± 4 V ........ 48 V ± 4 V
Current consumption (P48, IEC 61938) ............ 2 mA ...................... 2 mA ...................... 2 mA ...................... 2 mA ....................... 2 mA ....................... 2 mA ...................... 2 mA
Matching connector ....................................................... XLR3F ................... XLR3F ................... XLR3F ...................XLR3F .................... X LR3F ................... XLR3F ................... XLR3F
Weight ..................................................................................... 102 g ........................ 80 g ........................ 80 g ........................ 80 g ......................... 80 g ........................ 80 g ........................80 g
Diameter ..................................................................... 24/22 mm .................. 22 mm .................. 22 mm .................. 22 mm .................. 22 mm .................. 22 mm .................. 22 mm
Length................................................................................ 110 mm .................. 92 mm .................. 92 mm ..................92 mm .................. 92 mm .................. 92 mm .................. 92 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
transducer transducer transducer transducer transducer transducer transducer
figure-8 diffuse field free field wide angle low frequency cardioid
equalized equalized roll-off
20 kHz 20 kHz 20 kHz 20 kHz 20 kHz 20 kHz 20 kHz
Errors excepted, subject to changes • Printed in Germany • Publ. 01/08 058160/A05
Neumann is a registered trademark of the Georg Neumann GmbH in certain countries.
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