Google discontinues Chromecast Audio, but you can grab one for $15 now - The Verge
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Mkchromecast
Sonos Sues Google Again Over More Smart Speaker Patents - Voicebot.ai
Free Chromecast | Sonos Community
Sonos on the cheap: How Chromecast Audio breathes new life into old speakers | Ars Technica
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Bluetooth & Wireless Speakers - Package Sonos Move Smart Portable Wi-Fi and Bluetooth Speaker with Alexa and Google Assistant White and Google Google Chromecast Streaming Media Player Charcoal - Best Buy
Chromecast Audio: The Poor Man's Sonos?
Linking your Sonos to Google Home (Mini) - Coolblue - anything for a smile
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Sonos sued Google and won: Here's why and how it affects you
Chromecast Audio competes with Sonos for a tenth of the price | Engadget