Crown CM311 Microphone - American Musical Supply - YouTube
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AKG - AKG Crown Audio CM311A XLR Version Headworn Cardioid Condenser Microphone With XLR Connector, 50Hz-17kHz Frequency Response, 75Ohms Output Impedance - PSS Audiovisual Equipment
AKG CM311-Mini XLR Light, rugged head-worn mic for presenters, with Mini XLR Connector for PT - Canada's Favourite Music Store - Acclaim Sound and Lighting