The Shure SM58S is a variation of the classic SM58 vocal microphone, distinguished by the addition of an on/off switch while keeping the same core design and sound profile. Like the standard model, it’s a dynamic cardioid mic tuned for speech and singing, with a vocal‑focused frequency response of roughly 50 Hz to 15 kHz that brings clarity to the midrange while rolling off lows to reduce muddiness. Its cardioid pattern helps isolate the voice by rejecting sound from the sides and rear, and the built‑in spherical grille and internal pop filter help control wind noise and breath pops. The SM58S also uses Shure’s pneumatic shock‑mount system to minimize handling noise, and it’s housed in the same durable metal body and steel mesh grille as the non‑switch version. Sensitivity sits around –54.5 dBV/Pa, and the mic operates via a standard XLR connection with an impedance rating of 150 ohms (300 actual). For users who require the ability to silently mute or power down their mic during a performance, the SM58S offers that convenience without changing the familiar performance characteristics of the original SM58.