Amar G Bose died on Friday, aged 83.
The son of a Bengali liberation activist and a Philadelphia schoolteacher, Bose started out repairing electronic devices and went on to invent them. As an assistant professor at MIT in the mid-1950s, he bought a high-end hi-fi and found it unfit for purpose.
He put his mind to improving stereo speakers and home hi-fi, keeping his company stubbornly private and winding up one of the wealthiest men in audio, with a fortune estimated at over a billion dollars. Most of the company’s non-voting shares he donated to MIT, on condition that they may never be sold.