Beta 58A Vocal Microphone The Shure Beta 58A® is a high-output supercardioid dynamic vocal microphone designed for professional sound reinforcement and project studio recording. It has become a leading choice among vocalists and touring professionals worldwide. The Beta 58A maintains a true supercardioid pattern throughout its frequency range. This insures high gain before feedback, maximum isolation from other sound sources, and minimum off-axis tone coloration. The Beta 58A has a shaped frequency response that is ideal for close–up vocals. The superb performance of this microphone is not affected by rough handling because of its rugged construction, proven shock mount system, and hardened steel mesh grille. The Beta 58A® microphone accentuates the warmth and clarity of lead and backup vocals. Its supercardioid design provides maximum isolation from other onstage sounds. Supercardioid, Dynamic. Type Dynamic (moving coil) Frequency Response 50 to 16,000 Hz view larger NOTE: The curve above shows on-axis response at a distance of 2 feet from a uniform sound source. Your response may vary, depending on microphone position. Polar Pattern Supercardioid, rotationally symmetrical about microphone axis, uniform with frequency. Output Level (at 1,000 Hz) Open Circuit Voltage: -51.5 dBV/Pa* (2.6 mV) *1 Pa = 94 dB SPL Impedance Rated impedance is 150 ohms (290 ohms actual) for connection to microphone inputs rated low Z Phasing. Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3. Case Silver blue enamel-painted die cast metal with hardened, matte-finished, spherical steel mesh grille. Adjustable, Stand Adapter Slip-in microphone mounting, unbreakable, adjustable through 180 degrees with standard 5/8"-27 thread, black finish. Dimensions See User Guide. Net Weight 278 grams (9.92 oz)