Sonos has officially unveiled two new wireless smart speakers — the $249 Era 100, and the $449 Era 300. While the Era 100 is effectively a new version of the aging Sonos One, which it replaces, the Era 300 is an entirely new type of speaker for the company, with six drivers (including an up-firing tweeter) and compatibility with spatial audio formats like Dolby Atmos. #sonos #bluetoothspeakers #bluetoothspeaker #dolbyatmos