Shure BETA91A Cardioid Condenser Boundary Microphone


$569.00 $449.00

In Stock

SKU: SHR-BETA91A Categories: , Tag:


Cardioid Condenser Boundary Kick Drum Microphone
Kick drum microphone provides a strong low-end response and maximum gain-before-feedback due to its half-cardioid polar pattern. It features a two-position contour switch to maximize attack and clarity and a low-profile design.


  • 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 with a wide dynamic range for use in high SPL environments
  • Two-position contour switch to maximize attack and clarity depending on application: select the flat response setting for natural sound in most applications 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 zipper pouch

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).


  • Cartridge Type: Electret Condenser
  • Polar Pattern: Half-cardioid (cardioid in hemisphere above mounting surface)
  • Frequency Response 20 to 20,000 Hz
  • Output Impedance: @ 1 kHz 146 Ω
  • Sensitivity: open circuit voltage, @ 1 kHz, typical –48.5 dBV/Pa[1] (3.8 mV)
  • Maximum SPL: 1 kHz at 1% THD[2] 2500 Ω load 155 dB 1000 Ω load 151 dB
  • Signal-to-Noise Ratio: 64.5 dB
  • Dynamic Range: @ 1 kHz 2500 Ω load 125.5 dB 1000 Ω load 121.5 dB
  • Clipping Level: 20 Hz to 20 kHz, 1% THD 2500 Ω load 12.5 dBV 1000 Ω load 7.5 dBV
  • Self Noise equivalent SPL, A-weighted, typical 29.5 dB SPL-A
  • Common Mode Rejection 20 Hz to 200 kHz ≥55 dB
  • Frequency Contour Switch: 7 dB of attenuation centered at 400 kHz
  • Connector: Three-pin professional audio (XLR), male, balanced
  • Polarity: Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3
  • Power Requirements: 11–52 V DC[4] phantom power (IEC-61938), 5.4 mA
  • Net Weight: 470 g (16.6 oz.)

Additional information

Weight0.8 kg
Dimensions230 × 80 × 110 mm