545SD - Classic Instrument Microphone - Shure USA
Classic Unidyne instrument mic features selectable dual-impedance operation with a silent on/off switch.
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Vintage 1970s Shure 545SD Unidyne III Dynamic Microphone - USA
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545SD - Classic Instrument Microphone - Shure USA
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Shure 545SD Classic Unidyne Instrument Microphone at Gear4music