Shure Beta 91A
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).
- Description
- Technical Specification
Description
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
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
Sensitivityopen circuit voltage, @ 1 kHz,typical–48.5 dBV/Pa[1] (3.8 mV)
Maximum SPL : 2500 Ω load 155 dB-1000 Ω load 151 dB
1 kHz at 1% THD[2]
Signal-to-Noise Ratio[3]: 64.5 dB
Dynamic Range:2500 Ω load 125.5 dB-1000 Ω load 121.5 dB
@ 1 kHz
Clipping Level:2500 Ω load 12.5 dBV
1000 Ω load 7.5 dBV
20 Hz to 20 kHz, 1% THD
Self Noise:29.5 dB SPL-A
equivalent SPL, A-weighted,
typical
Common Mode Rejection:≥55 dB
20 Hz to 200 kHz
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.)
