CM-88 Condenser Microphone. The Nady CM-88 Condenser Microphone is a back electret microphone designed for cymbals of all types, reeds, acoustic guitars, piano, vocals (with optional windscreen), and overhead applications. Extremely uniform and tight cardioid pattern. CM-88 Microphone has extended frequency response for smooth, crisp transparent reproduction. Aluminum housing and gold-plated XLR contacts. 48V phantom powered.