Description

Description

Shure Beta 91A Boundary Microphone

The Shure Beta 91A boundary microphone is designed to capture the powerful punch and attack of low-frequency instruments, making it versatile for both kick drums and other instruments like organ and piano. Its low-profile, boundary design ensures a strong low-end response and allows for easy mounting inside a bass drum, ideal for recording and live sound reinforcement.

Key Features

  • Uniform half-cardioid polar pattern for optimal gain-before-feedback and off-axis sound rejection
  • Integrated preamplifier and XLR connector for efficient setup and minimal stage clutter
  • Wide frequency response suited for kick drum and low-frequency applications
  • Two-position contour switch for selecting between flat response and Low-Mid Scoop settings
  • Includes a zipper pouch for easy storage

Specifications

Category Specification Details
Microphone Capsule Electret Condenser
Microphone Polar Pattern Half-Cardioid
Microphone Tone Adjustment Low Cut: -7 dB at 400 kHz
Microphone On-Board Controls LF
Performance Frequency Range 20 Hz to 20 kHz
Performance Maximum SPL 155 dB SPL (1 kHz, 1% THD, 1-Kilohm Load); 151 dB SPL (1 kHz, 1% THD, 2.5-Kilohms Load)
Performance Impedance 146 Ohms
Performance Sensitivity -48.5 dBV/Pa; 3.8 mV/Pa
Performance Dynamic Range 125.5 dB
Performance Signal-to-Noise Ratio 64.5 dB
Performance Equivalent Noise Level 29.5 dB SPL A-Weighted (Typical)
Performance CMRR 55 dB
Connectivity Output Connectors (Analog) 1 x XLR 3-Pin
Power Operating Voltage 11 to 52 V (Phantom Power)
Power Operating Current Consumption 5.4 mA
Physical Dimensions H: 3.7 x W: 0.8 x L: 5.5″ / H: 95.1 x W: 20.3 x L: 139.1 mm
Physical Weight 16.6 oz / 470 g
Packaging Info Package Weight 1.85 lb
Packaging Info Box Dimensions (LxWxH) 10 x 5 x 3.4″
Additional information

Additional information

Brand

EAN

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