Neumann BCM 104 Condenser Microphone

The large-diaphragm condenser capsule used in the BCM 104 has a cardioid directional pattern with internally switchable proximity effect compensation. A second switch allows the sensitivity to be reduced by 14 dB.

The microphone headgrille twists off easily for quick cleaning. Neumann offers optional, color-coded headgrilles so that, for reasons of hygiene, each announcer working at an announcing desk can use his or her individual headgrille.

Directly in front of the capsule, mounted on a frame holder, is a piece of fine gauze that serves as a built-in popscreen.

The BCM 104 has an elastic mount against structure-borne noise, that is compatible with standard broadcast-segment microphone arms.

• Acoustical operating principle Pressure gradient transducer
• Directional pattern Cardioid
• Frequency range 20 Hz ... 20 kHz
• Sensitivity at 1 kHz into 1 kohm 22 mV/Pa
• Sensitivity at –14 dB attenuation 4.4 mV/Pa
• Rated impedance 50 ohms
• Rated load impedance 1 kohms
• Equivalent noise level, CCIR1) 18 dB
• Equivalent noise level, A-weighted1) 7 dB-A
• Maximum SPL for THD 0.5%2) 138 dB
• Maximum SPL for THD 0.5% with preattenuation2) 152 dB
• Signal-to-noise ratio, CCIR1) (rel. 94 dB SPL) 76 dB
• Signal-to-noise ratio, A-weighted1) (rel. 94 dB SPL) 87 dB
• Maximum output voltage 10 dBu
• Dynamic range of the microphone amplifier (A-weighted) 131 dB
• Supply voltage (P48, IEC 61938) 48 V ± 4 V
• Current consumption (P48, IEC 61938) 3.2 mA
• Matching connector XLR3F
• Weight 500 g
• Diameter 64 mm
• Length 85 mm
• Height (without suspension) 110 mm

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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