Austrian Audio OC818-DUALSETPLUS Large Diaphragm Microphone (Set of 2)Handcrafted in Vienna, the City of Music, the Austrian Audio OC818 is a revolutionary multi pattern, dual output large diaphragm condenser microphone with optional wireless control. Onboard, the OC818 offers a choice of four selectable polar patterns, 10dB and 20dB pads, and three switchable highpass filters. But with Austrian Audios open source PolarDesigner plug in (Mac and Windows), you can craft custom polar patterns for up to five different