Shure Beta 91A Kick-Drum Mic

Sku #H70025000000000

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Combines superior attack and punch for studio-quality sound.

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).

A 2-position contour switch maximizes 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 phantom power. Comes with zippered pouch.

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
  • 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

Get the low-end punch you need!

 

Beta 91A Kick-Drum Mic 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: 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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