Features selectable dual-impedance operation and a silent on/off switch. The predecessor to the SM57, the 545SD-LC Classic Unidyne® Instrument Microphone is a dual-impedance, unidirectional, dynamic microphone. Shipped connected for low-impedance operation, the 545SD-LC features a silent magnetic reed on/off switch with lock-on option. A favorite for instrument pickup and recording, the 545SD-LC can also be used on lecterns in public address systems. |