Vocal Microphone

The Shure Beta Microphone Series 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 BETA87A 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.

→ Premier live performance microphone with Shure quality, ruggedness, and reliability
→ Uniform supercardioid pick-up pattern for maximum gain before feedback and superior rejection of off-axis sound
→ Smooth, wide frequency response with gradual presence rise and controlled proximity effect tailored for vocals
→ Advanced cartridge shock mount system absorbs mechanical shock and minimizes handling noise
→ Dent-resistant steel mesh grille and enamel coated metal alloy construction resist wear and abuse
→ Effective built-in pop filter reduces undesirable wind and breath noise
→ Very low susceptibility to RF and electromagnetic hum

Cartridge Type	Electret Condenser
Frequency Response	50 to 20,000 Hz
Polar Pattern	Supercardioid
Output Impedance	150 ohms
Sensitivity (at 1kHz, open circuit voltage)	-52.5 dBV/Pa (2 mV); 1 Pascal=94 dB SPL
Maximum SPL (1 kHz at 1% THD, 1k ohms load)	140.5 dB
Signal-to-Noise Ratio (referenced at 94 dB SPL at 1 kHz)	70.5 dB; S/N ratio is difference between 94 dB SPL and equivalent SPL of self noise, A-weighted
Dynamic Range (at 1 kHz, 1 k ohms load)	117 dB
Clipping Level (1 kHz at 0.25% THD, 1k ohms load)	-6 dBV (0.5 V)
Self Noise (typical, equivalent SPL, A-weighted)	23.5 dB typical
Polarity	Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3
Weight Net	0.207 kg (0.475 lbs)
Connector	Three-pin professional audio (XLR), male
Power	Requirements 11 to 52 Vdc phantom (1.2 mA)