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.
Fifty years ago Bill Crutchfield sold car stereos by explaining, in exhausting detail, how to install them. That habit of over-explaining became the whole business.
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.