Sonos is a leading audio technology company that specializes in wireless multi-room home sound systems. Founded: 2002 in Santa Barbara, California, by John MacFarlane, Craig Shelburne, Tom Cullen, and Trung Mai. Headquarters: Santa Barbara, California. Core Innovation: Invented wireless audio syncing in 2004, allowing multiple speakers across different rooms to play music in perfect harmony over Wi-Fi. Wireless Speakers: Indoor and portable smart speakers like the Era 100, Era 300, and Move. Home Theater: Advanced soundbars and subwoofers such as the Arc Ultra and Sub.