Shure Incorporated was founded by Sidney N. Shure in Chicago, Illinois in 1925 as a one-man company selling radio component kits before factory-built radio sets were marketed. The company became a consumer and professional audio-electronics manufacturer of microphones, wireless microphone systems, phonograph cartridges, discussion systems, mixers, and digital signal processing. The company also manufactures listening products, including headphones, high-end earphones, and personal monitor systems.