Description
The Shure Beta 91A is designed for use with kick drums, piano and other traditional low frequency applications. An updated microphone capsule is tailored for bass-heavy environments to produce a powerful low frequency response, and a new design integrates the preamplifier and XLR connection for easy setup and minimal stage clutter. The Beta 91A combines superior attack and punch for studio-quality sound, even at extremely high sound pressure levels (SPLs).
Features
- 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
Specifications
Cartridge Type Electret Condenser
Polar Pattern Half-cardioid (cardioid in hemisphere above mounting surface)
Frequency Response 20 to 20,000 Hz
Output Impedance @ 1 kHz 146 Ω
Sensitivity open circuit voltage, @ 1 kHz, typical –48.5 dBV/Pa (3.8 mV)
Maximum SPL 1 kHz at 1% THD
- 2500 Ω load 155 dB
- 1000 Ω load 151 dB
Signal-to-Noise Ratio 64.5 dB
Dynamic Range @ 1 kHz
- 2500 Ω load 125.5 dB
- 1000 Ω load 121.5 dB
Clipping Level 20 Hz to 20 kHz, 1% THD
- 2500 Ω load 12.5 dBV
- 1000 Ω load 7.5 dBV
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 kHz
Connector Three-pin professional audio (XLR), male, balanced
Polarity Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3
Power Requirements 11–52 V DC[4] phantom power (IEC-61938), 5.4 mA
Net Weight 470 g (16.6 oz.)
