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Shure Beta 91A Half Cardioid Boundary Condenser Microphone

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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 Condenser Microphone Features
    • 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



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    WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

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    Shure Beta 91A Half Cardioid Boundary Condenser Microphone Specifications

    Shure Beta 91A Half Cardioid Boundary Condenser Microphone Specifications
    Product SpecificationsShure Beta 91A Condenser Microphone Specifications
    • 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: 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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