A one-room radio-parts shop in 1925 Chicago turned into the microphone every roadie trusts and every meeting room quietly runs on. Here is how Shure spent a century refusing to go public - or to make a fragile mic.
Fritz Sennheiser started a lab in a farmhouse in 1945. Eighty years later his grandsons run the microphone company that quietly powers your favorite show - and made a hard call about the headphones on your head.