BETA 91A

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.

Shure Beta 91A Condenser Boundary Microphone Features:

Type: Electret Condenser
Frequency Response: 20Hz-20kHz
Polar Pattern: Half-cardioid (cardioid in hemisphere above mounting surface)
Impedance: 146 Ohms
Sensitivity (at 1kHz, open circuit voltage): -48.5 dBV/Pa (3.8mV)
Maximum SPL ( kHz at 1% THD): 1,000 ohm load: 151dB; 2500 Ohm load: 155dB
Signal-to-Noise Ratio (referenced at 94 dB SPL at 1kHz): 64 dB
Dynamic Range (at 1kHz): 1,000 Ohm load: 121.5dB; 2500 Ohm load: 125.5dB
Common Mode Rejection (20Hz-20kHz): >55dB
Clipping Level (20Hz-20 kHz at 1% THD) 1,000 ohm load: 7.50dBV, 2,500 ohm load: 12.5dBV
Self Noise (typical, equivalent SPL, A-weighted): 29.5dB SPL-A
Polarity: Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3
Weight: 16.6 oz.
Frequency Contour Switch: 7dB of attenuation centered at 400Hz
Connector: 3-pin XLR, balanced
Power Requirements: 11-52 Vdc phantom power, 5.6 mA

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