Sonos plus Alexa makes for a smart -- and great-sounding -- speaker

The Sonos One wireless speaker, priced at $199, will be available Oct. 24. It will support multiple voice services, launching with Amazon Alexa, but will add Siri using AirPlay 2, and Google Assistant, in 2018. Sonos is upping the volume in the smart speaker race. Already well-known for its great sounding wireless home speakers, Sonos is bringing to market the first whole home speaker system with built-in voice control using Amazon's digital voice-commanded assistant Alexa. The new speaker, the $199 Sonos One, due out Tuesday, raises the bar for good-sounding smart speakers.