Shure SM58-LC Vocal Microphone, Cardioid
Type Dynamic 
Frequency Response
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50 to 15,000 Hz
Polar Pattern
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(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
Case  Dark gray, enamel-painted, die cast metal; matte-finished, silver colored, spherical steel mesh grille
Connector  Three-pin professional audio connector (male XLR type)
Net Weight  298 grams (10.5 oz)
Dimensions  162 mm (6-3/8 in.) L x 51 mm (2 in.) W

Shure SM58-LC Vocal Microphone, Cardioid