KLH Audio is an American hi-fi company founded in 1957 in Massachusetts, USA. KLH Audio was once one fo the leading loudspeaker companies in the world, and they continue their legacy today with a range of headphones, floorstanders, bookshelf speakers, and home cinema components.

Originally named KLH Research and Development Corporation, the company was founded by Henry Kloss, Malcolm S. Low, and Josef Anton Hofmann. From the beginning, the company's passion and expertise led by the three founders drove the development of their outstanding, and original loudspeaker designs. This expert team developed the acoustic suspension technology, with Henry Kloss at the forefront of this innovation, earning him a place in the Consumer Electronics Hall of Fame.

Since this company was once one of the largest loudspeaker company’s in the world, it’s no surprise that their speakers were ground-breaking in their designs. The Model Nine for example was the first full range electrostatic loudspeaker. They also famously launched the first-ever high-selectivity FM table radio, first portable solid-state record player and first reel-to-reel tape recorder.

In 2017, the brand was taken over by Klipsch executive David P. Kelley and moved their headquarters to Indiana, USA. Since then, KLH Audio have brought out an upgraded version of the acclaimed Model Nine and continue to launch their brand new lines of hi-fi speakers and high performance headphones.