Over the last decade, Sonos has slowly built up a reputation for making excellent speakers built for the age of streaming music. The company started in 2005 with the ZP100, a product that let buyers connect their speakers to the internet for streaming music, and pair units for multi-room audio. Sonos released an updated version, renamed the Connect Amp, shortly after, but since then the company has focused more on making its own speakers and hasn't updated the Connect Amp in years. That changes, as of today.
The new, $599 Sonos Amp is a major upgrade to the old Connect Amp. At a high level, the box connects up to four speakers to the Sonos platform, which means you can stream music and other audio from over 100 services to those speakers. If you have any existing Sonos speakers, you can group them with speakers connected to the Amp. It also has line-in for CD players, turntables or other audio devices; once they're hooked up, you can stream that audio to other Sonos speakers. And you can have multiple Amps that can all talk to each other, as well.