The Era 300 from Sonos: The Future of Speakers? March 19, 2023 Sonos is launching two new speakers at the same time. The Era 300 is designed for spatial audio and fires sound in multiple directions. The Era 100 improves upon the Sonos One with stereo audio and better bass. Both include Bluetooth and USB-C line-in so you can easily play music from other devices or plug in a turntable.