Shure Beta 91A — Kick Drum Boundary Microphone
The Shure Beta 91A is a professional-grade boundary microphone designed specifically for kick drums and other low-frequency sources. Its half-cardioid condenser capsule delivers focused, punchy low end with clear attack, while minimizing spill from cymbals and overheads. The integrated, low-profile form factor mounts directly inside the drum for consistent placement and isolation; its rugged construction withstands the rigors of live performance and studio use. The Beta 91A provides a strong low-end response and maximum gain-before-feedback due to its half-cardioid polar pattern. It features a two-position contour switch to maximize attack and clarity and a low-profile design.
Key features
Half-cardioid condenser capsule tuned for extended low-frequency response and tight transient detail while its designed polar pattern is optimized for maximum gain-before-feedback and rejection of off-axis sound
Integrated 20 dB pad to handle high sound pressure levels without distortion.
Low-profile, boundary-style design for stable, repeatable positioning inside the drum shell.
Balanced XLR output for reliable signal transfer in live and studio environments.
Durable construction built to endure touring and heavy use
Uniform half-cardioid 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
Sound and applications
Produces a focused, thumpy low end with defined beater attack—ideal for rock, pop, funk, and studio tracking.
Works well for kick drums of all sizes and for other low-frequency sources such as floor toms, low brass, or bass cabinets.
Commonly used in both live reinforcement and multitrack recording situations where a consistent, punchy kick sound is required.
Included and compatibility
Typically supplied with an XLR cable and mounting hardware for interior placement; check specific package contents.
Requires phantom power supply for optimal condenser performance; compatible with standard mixing consoles and preamps.
Why choose it
The Shure BETA®91A blends professional condenser clarity and high power handling with a practical boundary-style design, delivering a tight, impactful kick drum presence ideal for engineers and drummers. Built for both stage and studio use, its consistent placement and articulate low-frequency response make it well suited to situations where dependable bass definition is a priority. Featuring an updated microphone capsule, integrated preamplifier, and XLR output, the Beta 91A is specifically tailored for bass-frequency applications—including kick drums and traditional low-frequency sources such as piano—offering superior attack and punch and studio-quality sound even at extremely high SPLs.
Model #BETA-91A
**Prof Erny’s and select vendors have partnered with select vendors to offer products that ship directly from the manufacturer or distributor centers directly to your door. This approach streamlines delivery, reduces extra handling by third‑party shippers, and provides customers with access to a broader selection of quality items that aren’t typically available locally. This particular item ships from warehouses in Berlin, Connecticut or Menifee, California**
Shure Beta 91A — Kick Drum Boundary Microphone
The Shure Beta 91A is a professional-grade boundary microphone designed specifically for kick drums and other low-frequency sources. Its half-cardioid condenser capsule delivers focused, punchy low end with clear attack, while minimizing spill from cymbals and overheads. The integrated, low-profile form factor mounts directly inside the drum for consistent placement and isolation; its rugged construction withstands the rigors of live performance and studio use. The Beta 91A provides a strong low-end response and maximum gain-before-feedback due to its half-cardioid polar pattern. It features a two-position contour switch to maximize attack and clarity and a low-profile design.
Key features
Half-cardioid condenser capsule tuned for extended low-frequency response and tight transient detail while its designed polar pattern is optimized for maximum gain-before-feedback and rejection of off-axis sound
Integrated 20 dB pad to handle high sound pressure levels without distortion.
Low-profile, boundary-style design for stable, repeatable positioning inside the drum shell.
Balanced XLR output for reliable signal transfer in live and studio environments.
Durable construction built to endure touring and heavy use
Uniform half-cardioid 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
Sound and applications
Produces a focused, thumpy low end with defined beater attack—ideal for rock, pop, funk, and studio tracking.
Works well for kick drums of all sizes and for other low-frequency sources such as floor toms, low brass, or bass cabinets.
Commonly used in both live reinforcement and multitrack recording situations where a consistent, punchy kick sound is required.
Included and compatibility
Typically supplied with an XLR cable and mounting hardware for interior placement; check specific package contents.
Requires phantom power supply for optimal condenser performance; compatible with standard mixing consoles and preamps.
Why choose it
The Shure BETA®91A blends professional condenser clarity and high power handling with a practical boundary-style design, delivering a tight, impactful kick drum presence ideal for engineers and drummers. Built for both stage and studio use, its consistent placement and articulate low-frequency response make it well suited to situations where dependable bass definition is a priority. Featuring an updated microphone capsule, integrated preamplifier, and XLR output, the Beta 91A is specifically tailored for bass-frequency applications—including kick drums and traditional low-frequency sources such as piano—offering superior attack and punch and studio-quality sound even at extremely high SPLs.
Model #BETA-91A
**Prof Erny’s and select vendors have partnered with select vendors to offer products that ship directly from the manufacturer or distributor centers directly to your door. This approach streamlines delivery, reduces extra handling by third‑party shippers, and provides customers with access to a broader selection of quality items that aren’t typically available locally. This particular item ships from warehouses in Berlin, Connecticut or Menifee, California**
