The legendary Shure SM57 is exceptional for musical instrument pickup and vocals. With its bright, clean sound and contoured frequency response, the SM57 is ideal for live sound reinforcement and recording.The SM57 has an extremely effective cardioid pickup pattern that isolates the main sound source while minimizing background noise. In the studio, it is excellent for recording drums, guitar, and woodwinds.Outstanding performance, reliability, and application diversity make this "workhorse" the choice of performers, producers, and sound engineers worldwide.TypeDynamicFrequency Response40 to 15,000 HzPolar PatternUnidirectional (cardioid), rotationally symmetrical about microphone axis, uniform with frequency.Sensitivity (at 1,000 Hz)Open Circuit Voltage: -56.0 dBV/Pa* (1.6 mV)*(1 Pa = 94 dB SPL)ImpedanceRated impedance is 150 ohms (310 ohms actual) for connection to microphone inputs rated low impedancePolarityPositive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3ConnectorThree-pin professional audio connector (male XLR type)CaseDark gray, enamel-painted, die-cast steel with a polycarbonate grille and a stainless steel screen