Shure BETA 91A — Half-Cardioid Condenser Kick-Drum Microphone
BETA 91A Overview
The Shure BETA 91A is a precision-engineered half-cardioid condenser microphone purpose-built for kick drum and other low-frequency applications. Its half-cardioid polar pattern maximizes gain-before-feedback, making it well-suited for high-SPL live environments where isolation and rejection are critical. The microphone features an integrated preamp and a two-position contour switch that allows engineers to tailor the frequency response for enhanced attack and clarity. It is an ideal solution for live sound engineers, touring companies, houses of worship, and studio engineers who require consistent, repeatable kick drum capture.
The low-profile form factor allows the BETA 91A to sit discreetly inside a kick drum shell without interfering with beater placement or drum head positioning, simplifying setup and reducing stage clutter.
Key Features
- Half-Cardioid Polar Pattern — Provides strong rear rejection and maximizes gain-before-feedback in live and studio environments
- Strong Low-End Response — Optimized frequency response captures the full weight and punch of kick drum and low-frequency instruments
- Two-Position Contour Switch — Allows engineers to select between frequency response settings to maximize attack and clarity for different applications
- Integrated Preamp — Precision-engineered internal preamp delivers consistent signal quality without requiring an external preamp stage
- Low-Profile Design — Compact form factor sits flat inside a kick drum shell, enabling flexible placement without obstructing beater travel
- Built for Low-Frequency Applications — Suitable for kick drum, bass cabinet, and other high-SPL, low-frequency sound sources beyond the drum kit
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