SM58 Vocal Microphone The Shure SM58® unidirectional (cardioid) dynamic vocal microphone is designed for professional vocal use in live performance, sound reinforcement, and studio recording. It has a tailored vocal response for a sound which is a world standard for singing or speech. A highly effective, built-in spherical filter minimizes wind and breath "pop" noise. A cardioid pickup pattern isolates the main sound source while minimizing unwanted background noise. Rugged construction, a proven shock-mount system, and a steel mesh grille ensure that even with rough handling, the SM58 will perform consistently, outdoors or indoors. Type Dynamic (moving coil) Frequency Response 50 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) -54.5 dBV/Pa (1.85 mV) 1 Pa = 94 dB SPL Impedance Rated impedance is 150 ohms (300 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 metal; matte-finished, silver, spherical steel mesh grille Overall Dimensions See User Guide Net Weight 298 grams (10.5 oz)