Shure BETA91A Half-Cardioid Condenser Kick-Drum Microphone

Kick drum microphone 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.

The Shure 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).

Features

• 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 attack
• Requires no external mounting or accessories for ease of use and storage
• Furnished with zipper pouch
• Premier live performance microphone with Shure quality, ruggedness, and reliability
• Uniform half-cardioid polar pattern (in the hemisphere above mounting surface) for maximum gain before feedback and rejection of off-axis sound
• Tailored frequency response for kick drums and bass-heavy instruments
• Wide dynamic range for use in high SPL environments
• Two-position contour switch enhances attack and clarity
• Integrated preamp and XLR connector reduce stage clutter and provide a quick, secure setup
• Low profile design requires no external mounting hardware
• Steel grille and die-cast metal construction resist wear and abuse

Specs

• Type Electret Condenser
• Frequency Response 20 to 20,000 Hz
• Polar Pattern Half-cardioid (cardioid in hemisphere above mounting surface)
• Output Impedance 150 Ω
• Sensitivity at 1kHz,open circuit voltage -48.5 dBV/Pa(3.8 mV) [1]
• Maximum SPL 1 kHz at 1% THD [2], 2500 Ω load 155 dB, 1000 Ω load 151 dB
• Signal-To-Noise Ratio [3] 64.5 dB
• Dynamic Range at 1kHz, 2500 Ω load 125.5 dB, 1000 Ω load 121.5 dB
• Clipping Level 20 Hz to 20 kHz, at 1% THD, 2500 Ω load 12.5 dB, 1000 Ω load 7.5 dB
• Self Noise equivalent SPL, A-weighted, typical 29.5 dB SPL-A
• Common Mode Rejection (20 Hz to 200 kHz) ≥55 dB
• Frequency Contour Switch 7 dB of attenuation centered at 400 Hz
• Power Requirements 11–52 V DC phantom power [4] , 5.4 mA
• Polarity Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3
• Weight 470 g(16.6 oz.)
• Connector Three-pin professional audio (XLR), male, balanced