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Shure Beta 91A Instrument Microphone

 
  • Dale #:

    SHUR-BETA91A
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Description

The Shure Beta 91A is designed for use with kick drums, piano and other traditional low frequency applications. An updated microphone capsule is tailored for bass-heavy environments to produce a powerful low frequency response, and a new design integrates the preamplifier and XLR connection for e... Read More

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Description

The Shure Beta 91A is designed for use with kick drums, piano and other traditional low frequency applications. An updated microphone capsule is tailored for bass-heavy environments to produce a powerful low frequency response, and a new design integrates the preamplifier and XLR connection for easy setup and minimal stage clutter. The Beta 91A combines superior attack and punch for studio-quality sound, even at extremely high sound pressure levels (SPLs).

Features:

  • Premier live performance microphone with Shure quality, ruggedness, and reliability
  • Uniform half-cardioid polar pattern (in the hemisphere above mounting surface) for maximum gain before feedback and rejection of off-axis sound
  • Tailored frequency response for kick drums and bass-heavy instruments
  • Wide dynamic range for use in high SPL environments
  • Two-position contour switch enhances attack and clarity
  • Integrated preamp and XLR connector reduce stage clutter and provide a quick, secure setup
  • Low profile design requires no external mounting hardware
  • Steel grille and die-cast metal construction resist wear and abuse
  • Exceptional low-frequency reproduction
  • Extremely high SPL handling
  • High output level
  • No crossover distortion

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Product Specs

TypeElectret Condenser
Frequency Response 20 to 20,000 Hz
Polar Pattern Half-cardioid (cardioid in hemisphere above mounting surface)
Impedance 146 Ohms
Sensitivity (at 1 kHz, open circuit voltage) -48.5 dBV/Pa (3.8mV)
1 Pascal=94 dB SPL
Maximum SPL (1 kHz at 1% THD) 1000 Ohm load: 151 dB, 2500 Ohm load: 155 dB
Signal-to-Noise Ratio (referenced at 94 dB SPL at 1 kHz) 64 dB
S/N ratio is difference between 94 dB SPL and equivalent SPL of self noise, A-weighted
Dynamic Range (at 1 kHz) 1000 Ohm load: 121.5 dB
2500 Ohm load: 125.5 dB
Common Mode Rejection (20 Hz to 20 kHz) > 55 dB
Clipping Level (20Hz-20 kHz at 1% THD) 1000 Ohm load: 7.50 dBV, 2500 Ohm load: 12.5 dBV
THD of microphone preamplifier when applied input signal is equivalent to cartridge output at specified SPL
Self Noise (typical, equivalent SPL, A-weighted) 29.5 dB SPL-A
Polarity Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3
Weight Net: 470 g (16.6 oz.)
Frequency Contour Switch 7 dB of attenuation centered at 400 kHz 
Connector Three-pin professional audio (XLR), male, balanced
Power Requirements 11-52 Vdc phantom power, 5.6 mA

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