A one-off speaker box for Oklahoma pickup trucks became a global hardware company. Its most useful lesson is quieter than its products: engineer the hard part, then sell the customer less work.
It started as a shop that fixed factory radios. Sixty years later, Drive-In Autosound is still betting that the thing you can't buy on Amazon is a clean install - and that Colorado drivers will pay for it.
A tiny Riverside outfit run by industry lifers keeps inventing speaker categories the big brands never bothered to build - starting with a soundbar that lives in your ceiling.
For six decades a factory in a Kentucky town of 2,500 has been building the speakers inside your amplifier - and letting other brands take the credit.
For 38 years the Seattle chain sold drivers a better stereo than the one bolted in at the factory. Then the factory dashboard learned to do it all - and the largest independent car-audio retailer in America had to decide what it was really selling.