Boundary, or pressure zone, microphones are seeing a rapid expansion in use with the spreading deployment of various conferencing applications. Classrooms, conference rooms, and mobile meeting AV packages have brought about new models and features in this type of microphone. The CBL 99 boundary mic from AKG is equipped with three screw holes for permanent, secure mounting, and it features a switchable 150Hz bass-cut filter to limit the transfer of mechanical bumps and thumps from the mounting surface. Only 0.2in. thick, the matte black disk provides an omnidirectional pattern and it operates on 9V-52V phantom power. Optional accessories include a battery-operated power supply and a phantom power adapter cable.
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