
Boundary Layer Microphone
GFM 132
Neumann’s first and only boundary layer microphone. The GFM 132 was designed using computer simulations: The unique shape of the base plate avoids comb filter effects.

GFM 132
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- GFM 132
Frequency Range | 20 Hz ... 20 kHz |
Sensitivity at 1 kHz into 1 kohm | 18 mV/Pa |
Equivalent noise level, A-weighted 1 | 14 dB-A |
Maximum SPL for THD 0.5% 2 | 137 dB |
Maximum SPL for THD 0.5% with preattenuation 3 | 147 dB |
Signal-to-noise ratio, CCIR (re. 94 dB SPL) 4 | 70 dB |
Signal-to-noise ratio, A-weighted (re. 94 dB SPL) 5 | 80 dB |
Maximum output voltage | 10 dBu |
Supply voltage (P48, IEC 61938) | 48 V ± 4 V |
Current consumption (P48, IEC 61938) | 2 mA |
Matching connector | XLR 3 F |
Weight | 460 g |
Diameter | 213 mm |
Length | 168 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
3)
measured as equivalent el. input signal
4)
according to IEC 60268-1; CCIR-weighting acccording to CCIR 468-3, quasi peak; A-weighting according to IEC 61672-1, RMS
5)
according to IEC 60268-1; CCIR-weighting acccording to CCIR 468-3, quasi peak; A-weighting according to IEC 61672-1, RMS
Frequency Range | 20 Hz ... 20 kHz |
Sensitivity at 1 kHz into 1 kohm | 18 mV/Pa |
Equivalent noise level, A-weighted 1 | 14 dB-A |
Maximum SPL for THD 0.5% 2 | 137 dB |
Maximum SPL for THD 0.5% with preattenuation 3 | 147 dB |
Signal-to-noise ratio, CCIR (re. 94 dB SPL) 4 | 70 dB |
Signal-to-noise ratio, A-weighted (re. 94 dB SPL) 5 | 80 dB |
Maximum output voltage | 10 dBu |
Supply voltage (P48, IEC 61938) | 48 V ± 4 V |
Current consumption (P48, IEC 61938) | 2 mA |
Matching connector | XLR 3 F |
Weight | 460 g |
Diameter | 213 mm |
Length | 168 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
3)
measured as equivalent el. input signal
4)
according to IEC 60268-1; CCIR-weighting acccording to CCIR 468-3, quasi peak; A-weighting according to IEC 61672-1, RMS
5)
according to IEC 60268-1; CCIR-weighting acccording to CCIR 468-3, quasi peak; A-weighting according to IEC 61672-1, RMS
Choose other product
- CMV 3
- D-01
- GFM 132
- KFM 100
- KH 805
- KK 120 + KM D
- KK 131 + KM D
- KK 133 + KM D
- KK 143 + KM D
- KK 145 + KM D
- KK 183 + KM D
- KK 184 + KM D
- KK 185 + KM D
- KM 120
- KM 130
- KM 131
- KM 140
- KM 143
- KM 145
- KM 150
- KM 253
- KM 254
- KM 256
- KM 53
- KM 54
- KM 56
- KM 64
- KM 66
- KM 73
- KM 74
- KM 75
- KM 76
- KM 83
- KM 84
- KM 85
- KM 86
- KM 88
- KMA (1968)
- KMF 4 i
- KML
- KMR 81 D
- KMS 104 D
- KMS 105 D
- KMS 140
- KMS 150
- KMS 84
- KMS 85
- KTM
- KU 80
- KU 81
- M 269 c
- M 49
- M 50
- MM 2
- MM 3
- MM 5
- QM 69
- RSM 190 i
- RSM 191 A Set
- SM 2
- SM 23 c
- SM 69
- SM 69 fet
- SRM 64
- SRM 84
- TLM 103 D
- TLM 127
- TLM 170
- TLM 50
- U 47
- U 47 fet (1972)
- U 48
- U 497
- U 64
- U 67 (1960)
- U 77
- U 87 Anniversary Set
- U 87 i