Microphones : Instrument Microphones : Shure Incorporated - BETA 91A

Half-Cardioid Condenser Microphone

Series: Shure

Model: BETA 91A

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 at
Requires no external mounting or accessories for ease of use and storage

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The 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 at
Requires no external mounting or accessories for ease of use and storage
Furnished with zipper pouch

Microphone Type - Condenser
Polar/Pickup Pattern - Half-cardiod
Spec Sheet available - Yes

Impedance: 146 Ohms
Maximum Frequency Response (Bandwidth): 20 kHz
Maximum Frequency Response (Bandwidth): 20000 Hz
Minimum Frequency Response (Bandwidth): 20 Hz
Minimum Frequency Response (Bandwidth): 0.02 kHz
Dynamic Range: 125.50 dB
Impedance: 146 ohm
Maximum SPL (Sound Pressure Level): 155 dB
Sensitivity: -48.50 dBV
Signal to Noise Ratio: 64.50 dB
DC Voltage: 52 Volts
Product Weight: 1.04 lbs
Common Mode Rejection (20 Hz to 20 kHz): > 55 dB
Clipping Level (20Hz-20 kHz at 1% THD): 1000 Ohm load

THD of microphone preamplifier when applied input signal is equivalent to cartridge output at specified SPL
Self Noise (typical, equivalent SPL, A-weighted): 29.5 dB (SPL-A )
Polarity: Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3
Frequency Contour Switch: 7 dB of attenuation centered at 400 kHz
Connector: Three-pin professional audio (XLR), male, balanced
Power Requirements: 11-52 Vdc phantom power, 5.6 mA
Regulatory Compliance: CE, EMC

BETA 98H/C - Premium Cardioid Condenser Instrument Microphone with Preamplifier

Shure BETA 91A spec sheet.pdf 823 kb - Data Sheet

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Shure BETA 91A user guide.pdf 2368 kb - Instructions

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Included in Case Studies

Booker T. Washington High School for the Performing and Visual Arts

in Dallas, TX, USA

by Digital Resources, Inc.

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