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In 1970, Koss Headquarters moved into a larger facility, where it’s still located today.

Testing in the new facility exemplified Koss’ commitment to quality and accurate sound production.

The new Koss assembly line helped to increase production in the 70’s.

In 1972, Koss introduced its first billboards to the world. "Ever wonder why he's smiling?" was the first billboard to appear in Milwaukee.

Later, Koss billboards appeared in Los Angeles, Chicago, and Times Square in New York City.

In the early 70s, the Koss Mobile traveled the country bringing the Sound of Koss to many music lovers.

Koss was one of the early participants in Consumer Electronics Shows. Pictured is the Koss booth at Chicago’s McCormick Place in 1973.

When this billboard was introduced in 1977, Koss was beginning a new era of global expansion spreading the Sound of Koss around the world.