The Shure SM58 is a professional cardioid dynamic microphone, commonly used in live vocal applications. Produced since 1966 by Shure Incorporated, it has built an enviable reputation among musicians for its robust construction and technical performance, and is considered the industry standard for live performance microphones.[1] The SM58 is one of the best-selling microphones in the world. The SM stands for Studio Microphone.[2]
Like all directional microphones, the SM58 is subject to proximity effect, a low frequency boost when used close to the source. The cardioid response reduces pickup from the side and rear, helping to avoid feedback onstage. It uses the balanced XLR three-pin connection. There are wired (with and without on/off switch) and wireless versions. The microphone has a frequency response extending from 50 Hz to 15 kHz.[3] The SM58 uses an internal shock mount to reduce handling noise.
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Type Dynamic (moving coil)
Frequency Response 50 to 15,000 Hz
Polar Pattern Cardoid (unidirectional), 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)
Net Weight 298 grams (10.5 oz)