SM57 Instrument Microphone The legendary Shure SM57 microphone 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. It has an extremely effective cardioid pickup pattern which isolates the main sound source while minimizing background noise. In the studio, it is excellent for recording drums, guitar, and woodwinds. The SM57’s outstanding performance, legendary reliability, and diversity of application make this "workhorse" the choice of performers, producers, and sound engineers worldwide. Type Dynamic Frequency Response 40 to 15,000 Hz view larger Polar Pattern Unidirectional (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) Impedance Rated impedance is 150 ohms (310 ohms actual) for connection to microphone inputs rated low impedance. Polarity Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3. Connector Three-pin professional audio connector (male XLR type). Case Dark gray, enamel-painted, die-cast steel with a polycarbonate grille and a stainless steel screen. Dimensions See User Guide. Net Weight (without cable) 284 grams (10 oz)