>My brother inlaw gave me this old mic. It's says- MODEL 55S >suercardioid UNIDYNE unidirectional dynamic microphone.....SHURE >BROTHERS, INC..CHICAGO, U.S.A. >Has anyone ever used one and what did you think? sorry also it says multi inmpedance. It has a screw type adjuster that pivets between HML (High Med? Low)? P.A.D.