Designed to build on the strengths of the SM58, the Shure Beta 58a features a super cardioid pick-up response pattern (strong pickup front and sides, weak pickup at the rear) to ensure high gain-before-feedback and maximum isolation from other sound sources. This is an ideal mic for close-up vocal pickup, either in the studio or for sound-reinforcement purposes and, like its siblings, it has become wildly popular throughout the music industry.