The mkh 8090 is a high end condenser microphone with a wide cardioid pick up pattern which functions as a main mic when less acoustic impression of space is demanded and as a support mic it excels in capturing large groups of instruments it operates on the rf principle that has been used and perfected by sennheiser for more than 50 years among its advantages are low inherent self noise the capability to handle high sound pressure levels without distortion and good weather resistance