Crown MB3 Mini Boundary Microphone

Crown MB3 Mini Boundary Microphone

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.

Specifications:

• 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).
• 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 rati 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.
• Connector: 3-pin pro audio, XLR-M type.
• Materials: High-impact molded plastic and steel mesh mic grille, steel chassis.
• Finish: Satin black.
• Net weight: 2.7 ounces (78 grams).
• Optional accessories: PH-1A phantom power supply (1 channel, battery or DC-adapter powered). PH-4A phantom power supply (4 channels, AC powered).