Sonos has expanded its line of multiroom audio speakers with a compact, more affordable sound bar called the Sonos Beam. It will be available now for $399.  Like the Sonos One, this is a smart speaker that will include support for Amazon Alexa voice control and eventually Google Assistant (more on that shortly). The sound bar uses HDMI to communicate with the TV so users can turn off the television or change the volume just with their voice.