The Model 819 Microphone is designed especially for surface-mounted applications. It is a superior-quality permanently-biased (electret) condenser microphone with a hemi-cardioid directional pattern (cardioid in the hmisphere above the mounting surface).

The 816 is particularly suited for sound-reinforcement and recording of speech, singing, or acoustic instruments in locations like churches , schools, conference rooms, and theaters. Whenever an iconspicuous high-output, high-fidelity unidirectional surface-mounted microphoe is desireable, the 819 is a logical choise.