Shure product info:

The Shure BETA®87A is a premium quality supercardioid hand-held electret condenser vocal microphone with exceptionally smooth frequency response and high sound pressure level capability. Used for professional sound reinforcement, broadcasting, and studio recording applications, the Beta 87A combines superb performance with the ruggedness needed for touring and field production. 

The Beta 87A features a controlled low-frequency roll-off that compensates for proximity effect and prevents the “boomy” sound often associated with close pick-up. The characteristic Shure presence rise brightens the upper midrange. The tight supercardioid pattern, with null points at approximately 125 degrees, provides maximum isolation from other vocalists or instruments while offering minimal off-axis coloration. The Beta 87A operates on phantom power.

Features

    Smooth frequency response with gradual presence rise

    Highly consistent supercardioid polar pattern provides superior gain-before-feedback

    Electronic low-frequency roll-off compensates for proximity effect

    Wide dynamic range (117 dB) and low distortion characteristics

    Very low susceptibility to RFI and electromagnetic hum

    Advanced cartridge shock-mount system absorbs mechanical shocks and reduces handling noise

    Built-in pop filter reduces undesirable wind and breath sounds

    Legendary Shure quality and reliability

Type Condenser (electret bias)

Frequency Response 50 to 20,000 Hz

Polar Pattern Supercardioid

Phantom Supply Requirement: 11 to 52 Vdc, positive at both pins 2 and 3, Current Drain: 1.0 to 1.2 mA