Shure SM58

The Shure SM58 is a cardioid dynamic microphone introduced in 1966 and manufactured continuously by Shure Incorporated ever since. Designed by engineers Ben Bauer and Ernie Seeler, it represents a refinement of earlier Unidyne models, scaled down from large stand-mounted designs to create a handheld microphone suitable for live performance. The microphone's construction employs aluminium, steel, and plastic components, with an overall length of 165 mm. Its defining technical feature is a pneumatic suspension system—a soft rubber balloon surrounding the microphone capsule—that isolates it from handling noise far more effectively than spring or solid rubber mounts. This innovation proved essential for stage vocalists, whose movement and grip would otherwise introduce unwanted vibration into the signal. The ball-shaped mesh grille, which distinguishes the SM58 from its sibling the SM57 (designed for instruments), serves as an effective p-pop filter for vocal use.

The microphone's journey to ubiquity was neither immediate nor inevitable. Conceived for broadcast studio applications, it languished in the early 1970s until live sound engineers in Las Vegas embraced it for stage use. From that point forward, the SM58 became the de facto standard for live vocal performance, adopted by performers ranging from Mick Jagger and Tina Turner to Ed Sheeran and Billie Eilish. Its reputation rests on three pillars: durability, consistent sound reproduction, and ergonomic design. The microphone can handle sound pressure levels between 150 and 180 dB SPL—approaching the noise level of a space shuttle launch—without distortion. Its ruggedness has become legendary; documented instances include microphones surviving being run over, used as hammers, and dropped from significant heights.

The SM58's cultural significance extends beyond music performance. It has become the iconic visual representation of the microphone itself, appearing in clip art and symbolic contexts worldwide. Its cardioid polar pattern reduces pickup from the sides and rear, helping performers avoid feedback on stage while maintaining clarity of the primary vocal source. The microphone is available in both wired (with balanced XLR output) and wireless versions. The wired variant may include an on-off switch, though broadcast models typically omit this feature. The capsule itself remains a readily replaceable component, and due to sustained demand, the SM58 capsule is available across all eleven of Shure's wireless microphone lines. In nearly sixty years of continuous production, the SM58 has transcended its original broadcast purpose to become, quite simply, what most people sing through.