collapse expand iconDescription

The Beta 91A kick drum microphone from Shure is engineered to capture robust low-end and pack a punch. With its half-cardioid polar pattern, the Beta 91A rejects feedback and unwanted off-axis sound for pristine audio reproduction at high volumes. The precision-designed compact profile, integrated preamp and XLR connector reduce setup time and stage clutter.

Half-Cardioid Pattern Prevents Feedback

The Beta 91A's tailored half-cardioid pattern provides maximum gain before feedback for true-to-life kick drum tone. It also rejects unwanted sound from the sides and rear, focusing on the audio directly in front of the mic capsule. The result is a clear, full-bodied kick drum sound at high sound pressure levels on stage without squealing feedback.

Low-Profile Design Reduces Setup Time

There's no need to fuss with external mounts or accessories with the Beta 91A. Its compact, integrated design simply places on the floor in front of the kick drum for a quick setup and breakdown. The built-in XLR connector provides a secure connection without excess cable on the stage. Sound techs will appreciate how little space the Beta 91A takes up, leaving room for other mics and gear.

Tailored Frequency Response for Kick Drums

The Beta 91A's frequency response is precision-tuned to capture the low-end punch and attack of kick drums. It handles the extended low frequencies and high sound pressure levels of kick drums with ease for studio-quality results. The mic's wide dynamic range also ensures clarity at high volumes, capturing every detail of the performance.

Contour Switch Enhances Clarity

A 2-position contour switch on the Beta 91A provides added control over the mic's frequency response. Select the flat setting for a natural kick drum tone or the "low-mid scoop" setting for emphasized low-end and increased higher frequency attack. The contour switch makes it easy to optimize the Beta 91A for different kick drums and tuning without outboard gear.

Shure BETA 91A Kick Drum Microphone
Shure BETA 91A Kick Drum Microphone
Shure BETA 91A Kick Drum Microphone

collapse expand iconFeatures

  • Uniform half-cardioid polar pattern for maximum gain-before-feedback and rejection of off-axis sound
  • Precision-engineered low-profile design features integrated preamplifier and XLR connector to maximize setup efficiency while minimizing stage clutter
  • Frequency response tailored for kick drum/low frequency applications
  • Wide dynamic range for use in high SPL environments
  • Two-position contour switch to maximize attack and clarity
  • Requires no external mounting or accessories for ease of use and storage
  • Furnished with zipper pouch

collapse expand iconSpecs

  • Type: Electret 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

collapse expand iconWarranty

One year warranty on wireless mics, mixers, and circuitry products.
2 year warranty on wired mics.
Warranty terms vary. Check with manufacturer for specific product warranty.

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