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.

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.

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

Directional characteristics : Multi
Impedance : 275 (symmetrical)
Polar pattern : cardioid, omnidirectional, figure-8, supercardioid & custom programmable
Load impedance : > 1 k
Frequency range : 20 Hz - 20 kHz
Supply voltage : 48 V (< 4mA, typical 2.1mA)
Sensitivity (all directions) : 13mV/Pa
Main Connector : XLR 3 pin
or remote : Mini XLR 5 pin Connector for back membrane
Equivalent noise level : 9 dB SPL (A)
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)