With its noise-canceling abilities, the Crown CM-311A Cardioid Headset Microphone has an outstanding gain-before-feedback ratio.
Designed for touring and live-sound applications, the Crown CM-311A Cardioid Headset Microphone is a rugged head-worn microphone with unequalled performance. It sounds like the best handheld microphones—full, clear, and distortion-free, even with the loudest singers. The CM-311A is the latest version of the Crown’s proprietary Differoid® technology. Its cardioid pickup pattern rejects sounds from the rear, such as floor monitors. Its noise-canceling ability rejects sounds at a distance, such as instruments on stage and crowd noise. This results in the CM-311A having outstanding gain-before-feedback and isolation.
FCC Consumer Alert
This disclosure informs consumers that wireless microphone users must cease any wireless microphone operations in the 600 MHz service band no later than July 13, 2020. In addition, in many instances they may be required to cease use of these devices earlier if their use has the potential to cause harmful interference to 600 MHz service licensees’ wireless operations in the band.
Most users do not need a license to operate this wireless microphone system. Nevertheless, operating this microphone system without a license is subject to certain restrictions: the system may not cause harmful interference; it must operate at a low power level (not in excess of 50 milliwatts); and it has no protection from interference received from any other device. Purchasers should also be aware that the FCC is currently evaluating use of wireless microphone systems, and these rules are subject to change. For more information, call the FCC at 1-888-CALL-FCC (TTY: 1-888-TELL-FCC) or visit the FCC's wireless microphone website.