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Shure Beta 91A
Half Cardioid Condenser Kick Drum Microphone


The Shure Beta 91A is designed for use with kick drums, as well as other traditional low-frequency applications including piano.
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Shure Beta 91A
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The Shure Beta 91A is designed for use with kick drums, as well as other traditional low-frequency applications including piano. Featuring an updated microphone capsule, integrated preamplifier, and XLR connection, Beta 91A offers a strong low-frequency response and is specifically tailored for bass frequency applications. The Beta 91A combines superior attack and punch for studio-quality sound, even at extremely high sound pressure levels (SPL).

Shure Beta 91A Features:

  • Uniform half-cardioid polar pattern for maximum gain-before-feedback andrejection of off-axis sound.
  • Precision-engineered low-profile design features integrated preamplifierand XLR connector to maximize setup efficiency while minimizing stage clutter.
  • Frequency response tailored for kick drum/low frequency applications witha wide dynamic range for use in high SPL environments.
  • Two-position contour switch to maximize attack and clarity depending onapplication: select the flat response setting for natural sound in mostapplications or the "low-mid scoop" setting for a strong low frequency "punch"with plenty of higher frequency attack.
  • Requires no external mounting or accessories for ease of use and storage
  • Furnished with zippered pouch


  • Type: Electret Condenser
  • Frequency Response: 20Hz - 20kHz
  • Polar Pattern: Half-Cardioid (cardioid in hemisphere above mountingsurface)
  • Impedance: 146 Ohms
  • Sensitivity (at 1kHz, open circuit voltage): -48.5dBV/Pa (3.8mV) (1 pascal= 94dB SPL)
  • Maximum SPL (1kHz a 1% THD): 1,000 Ohm load: 151dB, 2,500 Ohm load: 155dB
  • Signal-to-Noise Ratio (referenced at 94dB SPL at 1kHz): 64dB
  • Dynamic Range (at 1kHz): 1,000 Ohm load: 121.5 dB / 2,500 Ohm load: 125.5dB
  • Common Mode Rejection (20Hz to 20kHz): >55dB
  • Clipping Level (20Hz - 20kHz at 1% THD): 1,000 Ohm Load: 7.50dBV/ 2,500 Ohm load: 12.5dBV
  • Self Noise (Typical, equivalent SPL, A-weighted): 29.5 dB SPL-A
  • Polarity: Positive pressure on diaphragm produces positive voltage on pin2 with respect to pin 3
  • Weight: Net: 470g (16.6oz)
  • Frequency Contour Switch: 7dB of attenuation centered at 400kHz
  • Connector: Three-pin professional audio (XLR), male, balanced
  • Power Requirements: 11-52 Vdc phantom power, 5.6mA


Inline Microphone Preamp for Beta 91/98 and Other Shure Mics
Shure RPM626 Inline Microphone Preamp for Beta 91/98 and Other Shure Mics
Shure's RPM26 is an inline microphone preamplifier for use with their WBH53, Beta 53, Beta 91, Beta 98, MC50, and MC51 microphones.
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In Stock
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Mic Cable
Shure C98D Mic Cable
Replacement cable for Beta 91, Beta 98S, and Beta 98D/S microphones.
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In Stock
Cardioid cartridge for Beta
Shure RPM108 Cardioid cartridge for Beta
Replacment Cartridge for Beta 91 and Beta 98 Microphone. The RPM108 cardioid condenser cartridge is recommended for general purpose sound reinforcement applications requiring good rejection of ambient noise. Use of windscreen highly ...
51.84 60.00 14
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