Product Introduction
The Shure BETA91A is a premium half-cardioid condenser boundary microphone designed for kick drums and low-frequency instruments. It delivers a powerful low-end response and maximum gain-before-feedback, making it ideal for live sound, studio recording, and high SPL environments.
With its integrated preamplifier, two-position contour switch for tone shaping, and low-profile design, the BETA91A combines precision, durability, and clarity for professional musicians and sound engineers.
Key Features (Bullet Points)
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Tailored for Kick Drums & Low-Frequency Instruments – Strong bass response with clarity
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Half-Cardioid Polar Pattern – Maximum gain-before-feedback & superior off-axis rejection
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Integrated Preamplifier & XLR Connector – Efficient setup, no external mounting needed
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Two-Position Contour Switch – Choose flat response for natural sound or “low-mid scoop” for extra punch & attack
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Low-Profile Design – Minimal stage clutter with easy placement inside the drum shell
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High SPL Handling – Studio-quality sound even at extremely high volume levels
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Updated Microphone Capsule – Improved high-frequency response over the original BETA91
Specifications
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Brand: Shure
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Model: BETA91A
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Transducer Type: Condenser
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Polar Pattern: Half-Cardioid
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Frequency Response: 20 Hz – 20 kHz
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Sensitivity: -48.5 dBV/Pa (3.80 mV)
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Equivalent Self-Noise: 29.5 dB(A)
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Maximum SPL: 155 dB
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Impedance: 146 Ω
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Switchable Low Cut: Yes
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Attenuation Pad: No
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Output Connector: 3-Pin XLR
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Interchangeable Capsule: No
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Requires Phantom Power: 11–52 VDC
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Dimensions: 20.3 × 139.1 × 95.11 mm (0.799 × 5.476 × 3.744 in)
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Weight: 470 g / 1.036 lbs
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Applications: Kick drums, piano, low-frequency instruments, live & studio environments
