Close shot of the KM A output stage

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The flexible miniature microphone system. A comprehensive selection of accessories permits adaptation to a wide range of requirements. Eight different capsules are available which are compatible to the digital miniature microphone system KM D.
Zoom: The KM A output stage
Technical data KM A +
KK 131 KK 133 KK 183
Acoustic operating principle Pressure transducer Pressure transducer Pressure transducer
Directional pattern omni free-field equalized omni diffuse-field equalized omni diffuse-field equalized
Frequency range 20 Hz...20 kHz 20 Hz...20 kHz 20 Hz...20 kHz
Sensitivity1) 12 mV/Pa 15 mV/Pa 12 mV/Pa
Rated impedance 50 ohms 50 ohms 50 ohms
Rated load impedance 1000 ohms 1000 ohms 1000 ohms
Equivalent noise level, CCIR3) 24 dB 28 dB 24 dB
Equivalent noise level, A-weighted3) 13 dB-A 15 dB-A 13 dB-A
Signal-to-noise ratio2) CCIR3) 70 dB 66 dB 69 dB
Signal-to-noise ratio2) A-weighted3) 81 dB 79 dB 81 dB
Max SPL (THD<0.5%) 140 dB 138 dB 140 dB
Max SPL (THD<0.5%) with 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
Matching connector XLR 3 M XLR 3 M XLR 3 M
Weight output stage 70 g 70 g 70 g
Weight capsule 11 g 49 g 11 g
Diameter 22 mm 22 mm 22 mm
Length 108 mm 128 mm 108 mm
Technical Data KM A +
KK 143 KK 184 KK 145
Acoustic operating principle Pressure gradient transducer Pressure gradient transducer Pressure gradient transducer
Directional pattern Cardioid wide Cardioid cardioid low frequ. roll-off
Frequency range 20 Hz...20 kHz 20 Hz...20 kHz 20 Hz...20 kHz
Sensitivity1) 15 mV/Pa 15 mV/Pa 14 mV/Pa
Rated impedance 50 ohms 50 ohms 50 ohms
Rated load impedance 1000 ohms 1000 ohms 1000 ohms
Equivalent noise level, CCIR3) 22 dB 22 dB 22 dB
Equivalent noise level, A-weighted3) 13 dB-A 13 dB-A 14 dB-A
Signal-to-noise ratio2) CCIR3) 70 dB 70 dB 70 dB
Signal-to-noise ratio2) A-weighted3) 81 dB 81 dB 80 dB
Max SPL (THD<0.5%) 138 dB 138 dB 138 dB
Max SPL (THD<0.5%) with preattenuation 148 dB 148 dB 148 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
Matching connector XLR 3 M XLR 3 M XLR 3 M
Weight output stage 70 g 70 g 70 g
Weight capsule 15 g 15 g 15 g
Diameter 22 mm 22 mm 22 mm
Length 108 mm 188 mm 108 mm
Technical Data KM A +
KK 185 KK 120
Acoustic operating principle Pressure gradient transducer Pressure gradient transducer
Directional pattern Hypercardioid Figure-8, side-fire
Frequency range 20 Hz...20 kHz 20 Hz...20 kHz
Sensitivity1) 10 mV/Pa 12 mV/Pa
Rated impedance 50 ohms 50 ohms
Rated load impedance 1000 ohms 1000 ohms
Equivalent noise level, CCIR3) 24 dB 25 dB
Equivalent noise level, A-weighted3) 15 dB-A 15 dB-A
Signal-to-noise ratio2) CCIR3) 69 dB 69 dB
Signal-to-noise ratio2) A-weighted3) 78 dB 79 dB
Max SPL (THD<0.5%) 142 dB 140 dB
Max SPL (THD<0.5%) with preattenuation 152 dB 150 dB
Supply voltage (P48, IEC 61938) 48 V 48 V
Current consumption (P48, IEC 61938) max. 3.5 mA max. 3.5 mA
Matching connector XLR 3 M XLR 3 M
Weight output stage 70 g 70 g
Weight capsule 19 g 37 g
Diameter 22 mm 24 mm
Length 108 mm 130 mm
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All data with respekt to 0 dB pre-attenuation and 0 dB gain.
1) at 1 kHz
2) re 94 dBSPL
3) according to IEC 60268-1;
CCIR-weighting according to CCIR 468-3, quasi peak;
A-weighting according to IEC 61672-1, RMS





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