Harman founded Harman/Kardon in 1953. He was known for the quality of working life programs he initiated at the company's plants.
Most recently he purchased Newsweek magazine from The Washington Post for $1. The magazine later merged with The Daily Beast.
A family statement says Harman died of complications from leukemia. He had learned of his illness about a month ago.
The family says he died in Washington, a city he loved and supported. He was surrounded by his wife, former California Rep. Jane Harman, and children.