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The Earthworks CTB30 Portable High Definition Boundary Microphone™ is the perfect choice for high quality sound system installations. It is a low profile, pristine sounding microphone solution for permanent or temporary sound installations. Its extended high frequency response to 30kHz and True Semisphere™ polar response provides the same high quality intelligibility of those speaking around the microphone without loss of high frequencies. In addition, the extremely fast diaphragm settling time allows more subtle details and nuances of the human voice to be reproduced, which adds to the amazing clarity and intelligibility of these microphones at various distances from the microphone. Available in black, white, silver and Nextel® Dark Black finish.