Perhaps the most widely known vocal mic in the world, the SM58 celebrated its 40th anniversary in 2006. 

It is a cardioid dynamic mic, designed around the same Unidyne III capsule as the SM57. In fact, the SM58 differs from the SM57 in only a few respects:

• The ball grille contains a foam blast filter.

• The ball grille reduces the bass boost due to proximity effect, simply because it prevents the mic’s capsule from being positioned so close to a sound source.

• The dynamic cartridge has a different resonator disk than is found on the SM57 (although the cartridges are internally identical).