The Blue 8-Ball
cardioid pressure gradient mic

Microphone courtesy of Jeff Rudisill

• Acoustical operating principle: pressure gradient
  
  
• Polar pattern: cardioid
  
  
• Frequency response: 35 Hz to 20 kHz
  
  
• Sensitivity: (1 kHz into 1 kΩ) 10 mV/Pa
  
  
• Rated impedance: 50 Ω
  
  
• Rated load impedance: Not less than 1 kΩ
  
  
• Maximum SPL: (THD 0.5%) 150 dB SPL
  
  
• Noise level: 22 dB “A” weighted
  
  
• Maximum output level: +14 dBu (2 kΩ load, 0.15% THD)
  
  
• Power requirement: +48V DC phantom power ±4V
  
  
• Power consumption: 1.5 mA