EV 644.—Directional dynamic
The Model 644 is a highly directional dynamic
microphone ideally suited for film and TV
production. The senility is so great that it picks
up from a fairly long distance without any audio
distortion. The combination of the front and side
openings enables the diaphragm to vibrate quite
smoothly in all directions of the openings, making
this mic unique to capture sound in almost
direction.