The Bock Audio iFET is a Dual Mode large diaphragm condenser FET studio microphone. Essentially the iFET has a single capsule and transformer, that is shared & powered by two separate microphone amplifiers. A unique design, there is a switch on the front of the body to select between the two modes - V & I. The vocal mode offers better high frequency response, has a higher proximity effect and higher sensitivity. The instrumental setting allows for a Higher SPL, less proximity effect and lower sensitivity. Like all Bock Audio products, the iFET is hand built in the USA.