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Large-diaphragm Condenser Microphone with Multiple Polar Patterns


The new viennese original


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.


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


The heart of the OC818 CKR12 Ceramic Capsule

Making Passion Heard


We bring passion to everything we do, and nobody brings more than our engineering team. Every CKR12 ceramic capsule is handmade in-house at our facility in Vienna and now we are developing the next generation of transducer and microphone builders to serve our expanding customer-base.



Austrian Audio OC818 Studio Set: Large-diaphragm Condenser Microphone

SKU: OC818 Studio Set

Directional characteristics:



275 Ω (symmetrical)

Polar pattern:

cardioid, omnidirectional, figure-8, supercardioid & custom programmable

Load impedance:

> 1 kΩ

Frequency range:

20 Hz - 20 kHz

Supply voltage:

48 V (< 4mA, typical 2.1mA)

Sensitivity (all directions):


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)


157 x 63 x 35 mm

Switchable pad:

-10 dB, -20 dB



Analog Low Cut filter:

40 Hz (2nd order), 80 Hz (2nd order), 160 Hz (1st order down to 80Hz, 2nd order below)

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