The Shure BETA 57A is a high output supercardioid dynamic microphone designed for professional sound reinforcement and project studio recording. It maintains a true supercardioid pattern throughout its frequency range. This ensures high gain before feedback, maximum isolation from other sound sources, and minimum off-axis tone coloration. A completely new grille design lets you take better advantage of proximity effect. The BETA 57A is an exceptionally versatile microphone. Typical applications include drums, guitar amplifiers, brass, woodwinds, and vocals.Technical InfoType: Dynamic (moving coil)Frequency Response: 50 to 16,000 Hz Polar Pattern: Supercardioid, rotationally symmetrical about microphone axis, uniform with frequency Impedance: Rated at 150 _ (290 _ actual) for connection to microphone inputs rated low ZOutput Level (at 1,000 Hz)Open Circuit Voltage: ?71 dB*(0.28 mV)*0 dB = 1 v/_bar Hum Pickup (at 60 Hz)Maximum 15.0 mV in 10 oe fieldMaximum 26.5 dB equivalent SPL per 1 moePolarity: Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3Connector: 3-pin professional audio connector (male XLR)Case: Silver Blue enamel-painted die-cast metal with hardened, matte-finished steel mesh grilleSwivel Adapter: Slip-in, adjustable through 180�, with standard 5/8"-27 threadNet Weight: 272 g (9.71 oz.)
