https://www.techradar.com/news/first-look-sonos-amp

Well, this was unexpected. Sonos takes years to do a hardware launch then it has three in the space of 12 months. 

But while the Sonos Beam and Sonos One were pushed squarely at consumers looking to upgrade their TV and audio setups, the Sonos Amp is catering to both the custom install market and those who want some oomph in their connected home setup.