Key Features:

• Handmade CKR12 ceramic capsule : Made to the same critical dimensions as the classic CK12 capsules
• Multiple polar patterns : Cardioid, omnidirectional & custom programmable
  
• Microprocessor control of polarisation voltages : Allows remote controlled polar pattern settings
  
• Two different analogue high-pass filters with three settings : 40 Hz, 80 Hz, 160 Hz
  
• Two different types of analogue pads : -10 dB, -20 dB
  
• Dual outputs : for recording each diaphragm separately

Engineered and manufactured in Austria, The OC818 is Austrian Audio’s premier, professional, large diaphragm microphone. Its high sensitivity, low self-noise and ability to handle everything from a whisper to extreme SPLs make it the most advanced microphone for studio, broadcast and live applications. As the unique ceramic capsule design is so consistent, any OC818 is match-paired with any other OC818, and when in cardioid mode, it can also be match-paired with any OC18, its affordable, smaller sibling.

Specifications: 

• Directional characteristics: Multi
• Impedance: 275 Ω (symmetrical)
• Polar pattern: cardioid, omnidirectional, figure-8, hypercardioid & custom programmable
• Load impedance: > 1 kΩ
• Frequency range: 20 Hz - 20 kHz
• Supply voltage: 48 V (< 4mA, typical 2.1mA)
• Sensitivity (all directions): 13mV/Pa
• Main Connector: XLR 3 pin
• Equivalent noise level: 9 dB SPL (A) or remote: Mini XLR 5 pin Connector for back membrane
• Max SPL: 148 dB SPL (158 dB SPL)
• Dimensions: 157 x 63 x 35 mm
• Switchable pad: -10 dB, -20 dB 
• Weight: 360g
• Analog Low Cut filter: 40 Hz (2nd order), 80 Hz (2nd order), 160 Hz (1st order down to 80Hz, 2nd order below)