The CM11B is a surface-mount boundary microphone with an omnidirectional polar pattern and a fixed-charge condenser element, designed for boardrooms and conference tables. It captures speech over a 180-degree field with a 30–18,000 Hz frequency response, -39 dBV/Pa sensitivity, 600 Ω impedance, 127 dB SPL, and 103 dB dynamic range, plus an internal high-pass filter. The mic uses a mini XLR connector, operates on 9–52 V phantom power, and includes a 30‑ft cable with mini-to-standard XLR connectors.