Shure BETA 91A Half-Cardioid Condensor Kick-Drum Microphone

DESCRIPTION

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.

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[1] (3.8 mV)
  
• 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 @ 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.)