Sonos just announced a firmware update that eliminates the need for the Bridge, which had to be physically connected to a router with an Ethernet cable for any Sonos system to work. Now, you can connect to one or more Sonos speakers directly via Wi-Fi, with no hard-wired connection. During configuration, a speaker will form an ad hoc connection with your mobile device. You can set up one of the speakers to act as a wireless bridge for multi-speaker setups, although there are some limitations as compared to a Bridge setup. […] For the Wi-Fi-only setup, all speakers will need to be in range of your Wi-Fi router, which means you are limited in terms of speaker placement. And although the Wi-Fi feature will work with the company’s Playbar soundbar by itself, a hardwired Bridge is still required for 5.1- and 3.1-channel Sonos home-theater setups. – Tim Moynihan,WIRED

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