Amar G. Bose, the visionary engineer, inventor and billionaire entrepreneur whose namesake company, the Bose Corporation, became synonymous with high-quality audio systems and speakers for home users, auditoriums and automobiles, died on Friday at his home in Wayland, Mass. He was 83.

His death was confirmed by his son, Dr. Vanu G. Bose.

As founder and chairman of the privately held company, Dr. Bose focused relentlessly on acoustic engineering innovation. His speakers, though expensive, earned a reputation for bringing concert-hall-quality audio into the home.

And by refusing to offer stock to the public, Dr. Bose was able to pursue risky long-term research, such as noise-canceling headphones and an innovative suspension system for cars, without the pressures of quarterly earnings announcements.

In a 2004 interview in Popular Science magazine, he said: “I would have been fired a hundred times at a company run by M.B.A.’s. But I never went into business to make money. I went into business so that I could do interesting things that hadn’t been done before.”