Farralane.com - Shure 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.

Frequency response tailored for vocals, with brightened midrange and bass rolloff to control proximity effect
Uniform supercardioid pattern for high gain before feedback and superior rejection of off–axis sound
Neodymium magnet for high signal–to–noise output

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)