Sidney Harman of Harman Media has purchased Newsweek from the Washington Post Co. for what is said to be $1 plus assumption of all obligations such as leases which are rumored to be around 30 million dollars.  Harman, 91, made his name in high-fidelity stereo equipment, founding Harman Kardon premium audio company in 1952. But he became a high-profile philanthropist and author on such topics as quality of working life, productivity and education. He earned a PhD in education in 1973 and founded the Program on Technology, Public Policy and Human Development at Harvard University. In Washington, he is a trustee of Shakespeare Theatre Company. He is married to Rep. Jane Harman (D-Calif.).