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Crown Audio MB-3 Mini-Boundary Microphone

Crown Audio MB-3 Mini-Boundary Microphone


Our Price : $199.56

Product Code: 505336


The Crown® MB-3 is a miniature boundary microphone for multi-miking applications such as teleconferencing, distance learning, boardrooms, courtrooms, and security applications.

This low-profile, circular mic permanently installs into a hole drilled in a table, lectern, or ceiling. Thanks to its supercardioid pickup pattern, the MB-3 greatly reduces ambient noise and pickup of room reverberation. The result is a clearer, more intelligible sound.

On the bottom of the mic is a tubular power module with a 3-pin XLR-type output connector. It is powered by 12-48V phantom power, and has a low-impedance balanced mic-level output.

  • Ideal for teleconferencing, distance learning, boardrooms, courtrooms and security
  • Small and inconspicuous
  • Installs permanently in a table top, wall or ceiling
  • Half-supercardioid polar pattern reduces pickup of background noise, room acoustics and feedback

  • Type: Phase Coherent Cardioid.
  • Element: Electret condenser.
  • Frequency response (typical): 50 Hz to 15,000 Hz at 30 degrees incidence to surface
  • Polar pattern: Half-supercardioid (supercardioid in the hemisphere above the primary boundary). See
  • Impedance: 150 ohms, balanced (recommended load impedance 1000 ohms or greater).
  • Open-circuit sensitivity (typical): 22 mV/Pa* (–33 dB re 1 volt/Pa).
  • Power sensitivity: –30.5 dB re 1 mW/Pa*. EIA rating –125 dBm.
  • Equivalent noise level (self-noise): 22 dB SPL typical (0 dB=0.0002 dyne/cm2), A-weighted.
  • S/N ratio: 72 dB at 94 dB SPL.
  • Maximum SPL: 120 dB SPL at 3% THD.
  • Polarity: Positive (inward) pressure on the diaphragm produces positive voltage on pin 2 with respect to pin 3.
  • Operating voltage: Phantom power, 12-48 volts DC on pins 2 and 3 with respect to pin 1 of output connector.
  • Current drain: 4 mA nominal. pickup of background noise, room acoustics and feedback
  • On-surface mounting eliminates phase interference from table sound reflections, giving a natural sound

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