Shure BETA-91A Half-Cardioid Condenser Microphone

→ 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 O
→ Sensitivity open circuit voltage, @ 1 kHz, typical: –48.5 dBV/Pa[1] (3.8 mV)
→ Maximum SPL 1 kHz at 1% THD[2]: 2500 O load 155 dB; 1000 O load 151 dB
→ Signal-to-Noise Ratio[3]: 64.5 dB
→ Dynamic Range @ 1 kHz: 2500 O load 125.5 dB; 1000 O load 121.5 dB
→ Clipping Level 20 Hz to 20 kHz, 1% THD: 2500 O load 12.5 dBV; 1000 O 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.)
→ 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
→ Exceptional low-frequency reproduction
→ Extremely high SPL handling
→ High output level
→ No crossover distortion