KLH is an audio company founded in 1957 as KLH Research and Development Corporation in Cambridge, Massachusetts, United States, by Henry Kloss, Malcolm S. Low, and Josef Anton Hofmann originally to produce loudspeakers. KLH was once the largest loudspeaker company in the world! KLH was purchased by David P. Kelley, longtime Klipsch executive, in 2017. He moved the global headquarters to Noblesville, Indiana.