KM 184 mt Stereo Set- black
The Neumann KM A / KM D miniature microphone system
The KM A / KM D modular miniature microphone system is a further development of the successful KM 100 series. The newly developed passive capsule design is available in 8 different directional characteristics and can be combined in a modular fashion with either an analog output stage (KM A) or digital A output stage (KM D), in accordance with the AES 42 standard. The new, significantly smaller microphone capsules and a comprehensive range of accessories enable the microphone system to be excellently adapted to a wide variety of applications.
By using the latest electronic components, the system offers many electroacoustic and operational advantages, such as lower self-noise, a wider dynamic range, and very high electromagnetic immunity. The capsules' acoustics have been adopted from the proven KM 100 system.
Overview of microphone capsules
KK 120: Eight
KK 131: Omnidirectional (free-field equalized pressure transducer)
KK 133: Omnidirectional (diffuse-field equalized pressure transducer/capsule including titanium diaphragm with exceptional acoustic properties)
KK 183: omnidirectional (diffuse field equalized pressure transducer)
KK 143: wide cardioid
KK 145: cardioid with acoustic depth reduction in the free field
KK 184: cardioid
KK 185: hypercardioid
KM A/KM D output stage
The KM A analog output stage with P48 phantom powering has a switch for 10 dB pre-attenuation. This allows the microphones to transmit levels of up to 152 dB (depending on the type of capsule). The KM D digital output stage converts the signal output from the capsule directly into a digital signal. The result is an AES/EBU signal with 24 bits and a high dynamic range. The integrated DSP allows remote microphone control, such as digital gain, pre-attenuation (6, 12, 18 dB) and low-cut filters (0, 40, 80, 160 Hz). An integrated peak limiter and compressor/limiter with additional de-esser function prevents any overdriving of the audio signal.
The dimensions (diameter 22 mm, length 93 mm) of the analog and digital output stages are identical. As a result, all accessories can be used in combination with both output stages.
On request, it is possible to supply a mechanical adapter from microphone capsules of the KM 100 system (AK series) to the KM A and KM D output stages.
The modular solution allows a distance of up to 100 m between the remote microphone capsule and the output stages. The LC 4 connecting cable with a length of 5 or 10 meters is available as a standard solution. Alternatively, capsule extensions of various lengths, swivel and stand joints, etc. can be used for a flexible setup of the system.
The KK 183, 184 and 185 capsules are also available in a set, together with the corresponding output stage, and then bear the names KM 183 A or KM 183 D, etc.
KK 184 + KM A = KM 184 A
Very universally applicable, especially good for recording situations in which crosstalk components of other instruments have to be suppressed mainly from the rear half-space
Stereo pairs in XY and ORTF technique
Speaker microphone broadcasting
Support microphone, overhead
(close-up) recording for e.g. strings, winds, percussion, piano, Leslie, guitar amplifier
Small-diaphragm microphones with eight interchangeable capsules, compatible with KM D digital no-microphone system
Switchable 10 dB pre-attenuation
Extensive range of accessories
Set with windscreen and clamp
Specifications KM A +
KK 131 KK 133 KK 183
Acoustic mode of operation Pressure receiver Pressure receiver Pressure receiver
Polar pattern Omnidirectional, free-field equalized Omnidirectional, diffuse-field equalized Omnidirectional, diffuse-field equalized
Transmission range 20 Hz...20 kHz 20 Hz...20 kHz 20 Hz...20 kHz
Field transfer factor1) 12 mV/Pa 15 mV/Pa 12 mV/Pa
Nominal impedance 50 Ohm 50 Ohm
Nominal load impedance 1000 Ohm 1000 Ohm 1000 Ohm
Equivalent noise level, CCIR3) 24 dB 28 dB 24 dB
Equivalent noise level, A-weighted3) 13 dB-A 15 dB-A 13 dB-A
Noise level spacing2) CCIR3) 70 dB 66 dB 69 dB
Noise level spacing2) A-weighted3)) 81 dB 79 dB 81 dB
Limiting sound pressure level for k<0.5% 140 dB 138 dB 140 dB
Limiting sound pressure level for k<0.5% m. Preattenuation 150 dB 148 dB 150 dB
Supply voltage (P48, IEC 61938) 48 V 48 V 48 V
Current consumption (P48, IEC 61938) max. 3.5 mA max. 3.5 mA max. 3.5 mA
Connector XLR3M XLR3M XLR3M
Weight output stage 70 g 70 g
Weight capsule 11 g 49 g 11 g
Diameter 22 mm 22 mm
Length microphone 108 mm 128 mm 108 mm
1) at 1 kHz
2) referred to 94 dBSPL
3) according to CCIR 468-3 resp. IEC 61672-1
Scope of delivery
2 x microphone KM 184 mt, 2 x windscreen WNS 100, 2 x stand joint SG 21 bk, wooden case
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