Heil Sound Pro Set 3 Closed Back Studio HeadphonesThe Heil Pro Set 3 Stereo Headphones were designed by Bob Heil for a wide variety of applications such as studio recording, casual listening, amateur radio, Internet and commercial broadcasting. The over ear headphones weigh only 7 oz and feature padded ear cups so that they will be comfortable and non fatiguing over long periods of time. They provide a wide frequency response of 10 to 22,000 Hz. To accommodate different listening situations, the