Product Details


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).


  • 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
Microphone Type
Polar Pattern
Frequency Response
Form Factor
Model Line
Type Electret Condenser
Frequency Response 20 to 20,000 Hz
Polar Pattern Half-cardioid (cardioid in hemisphere above mounting surface) 

Additional specifications are available in the user guide.

Product Reviews

BETA 91A Reviews

Read what people think about the Beta 91A.

“[Beta 91A] has exceptional low-frequency reproduction, high SPL handling, and a high output level, which makes it ideal for capturing the kick drum, as well as other low-frequency sound sources.”
 –Butch Jones, Modern Drummer

Software & Downloads


File Language Type File Size
BETA Microphones Brochure English PDF 1.51 mb

CAD Drawings

File Language Type File Size
BETA 91A CAD Drawing English ZIP 50 kb

Specification Sheets

File Language Type File Size
Beta 91A Specification Sheet English PDF 858 kb

User Guides

File Language Type File Size
BETA 91A User Guide

Product Support

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