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I have a total of 7 other speakers, the boost and now the port that I have connected my home theater to.   When playing music all of my speakers are now out of sync with timing.   I’ve done all the updates.  Tried all 3 channels,  restarted the network and restarted each speaker.   Is there something else I can do to make them all play at the same time because my house now sounds like a echo chamber.  

Have you tried changing the WiFi channel on your router? Is your Boost too close to your router?


Your home theatre amp is adding a delay, look in the handbook for a direct or pure mode. This would bypass any additional processing and hopefully make it sync with the rest of your Sonos equipment.


I had the same issue and needed the same solution on two systems. Both my Denon and Yahama AVRs added a delay when in anything other than direct mode, bypassing the equalization and other processing.