Neumann KM 183 Omnidirectional Microphone, Nickel (Single)
The KM 183 and KM 184 microphones are the successors of the well proven KM 83 and KM 84, which have been used since the seventies worldwide with great success. The KM 185 rounds out the series with a hypercardioid microphone.
The KM 183 is a pressure transducer with a boost of approximately 7 dB at 10 kHz in the free field. In the diffuse sound field it has a flat frequency response. The pressure gradient transducers KM 184 and KM 185 feature very smooth frequency responses not only for the 0° axis, but also for lateral (off-axis) sound incidence. In typical usage, there is no coloration of sound over a wide pickup angle.
Although the KM 184 has the same capsule as the KM 84, the microphone differs slightly on the 0° frequency response: The KM 184 has a gentle rise at about 9 kHz, a characteristic that was introduced very successfully with the KM 140. The result is a tonal balance that is fresher and livelier when compared to the KM 84 with its flat frequency response in that band.
This difference was achieved with just a slight change of the capsule's rear opening, and is not due to resonances.
The KM 185 with its hypercardioid characteristic features attenuation of sound incidence from the side or rear of about 10 dB, with minimum sensitivity at an angle of 120°.
The "Series 180" microphones have the same transformerless circuitry as is used in the KM 100 system, resulting in excellent technical specifications:
Compared to the KM 84 the dynamic range of the KM 184 increased by 24 dB mainly through the reduction of self-noise level to only 22 dB (CCIR) and an increased sound pressure handlingcapability of up to 138 dB.
The microphones operate without any problems, even if the input of following equipment happens to be unbalanced, for example as in some DAT recorders.
The output of the "Series 180", as in all Neumann microphones, is balanced and phantom (48V) powered.
The "Series 180" is a good choice for all users who look for a high-quality miniature microphone, but do not need the complex, modular KM 100 system, which continues to be part of the Neumann product range.
The mechanical construction was simplified, for example, capsule and output stage cannot be separated from each other. For this reason the "Series 180" is an economical alternative without giving up the electroacoustic features the users expect from Neumann microphones.
Three different miniature microphones for all typical studio applications
Successor of the worldwide successful KM 83/84
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, drums
Ideal as AB stereo pair because of the flat frequency response in the diffuse sound field
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, choir
Acoustical operating principle Pressure/Pressure gradient transducer
Directional pattern omnidirectional/cardioid/hypercardioid
Frequency range 20 Hz ... 20 kHz
Sensitivity at 1 kHz into 1 kohm 12/15/10 mV/Pa
Rated impedance 50 ohms
Rated load impedance 1 kohms
Equivalent noise level, CCIR1) 24/22/24 dB
Equivalent noise level, A-weighted1) 13/13/15 dB-A
Signal-to-noise ratio, CCIR1) (rel. 94 dB SPL) 70/72/70 dB
Signal-to-noise ratio, A-weighted1) (rel. 94 dB SPL) 81/81/79 dB
Maximum SPL for THD 0.5%2) 140/138/142 dB
Maximum output voltage 10 dBu
Supply voltage (P48, IEC 61938) 48 V ± 4 V
Current consumption (P48, IEC 61938) 3.2 mA
Matching connectors XLR 3F
Weight approx. 80 g
Diameter 22 mm
Length 107 mm
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