Home Theater with Era 300

You can’t add them to what you have without first removing the Play:1’s. Then use the Eras as surrounds, and set up the Play:1’s in another room. 

The system doesn't support play1 and Era 300 at the same time?

Your current Home Cinema is known to the Sonos App as a single Sonos ‘Room’.  As @nik9669a states, to add two new Era 300’s as replacement surrounds, you need to complete the following steps:

• Open the Sonos App>Settings>System and select your Beam
• Scroll down and select ‘X Remove Surrounds’
• The two Play:1’s can now either be named as two new Sonos Room’s or a Stereo pair in a single Sonos Room.
• When you power on your new Era300’s the Sonos App will detect them.  Add them to your existing system and then open up Settings>System and select your Beam again.
• Scroll down and select Add Surrounds.

If you experience any problems, then please come back and we can talk you through any issues.

(I’ve just down the exact same actions, when upgrading my Sonos One’s to Era 300’s.)

The system supports it. Once you’ve (a) replaced the Play:1’s with Era’s and set them up as another room, or (b) added the Era’s as a stereo pair in another room, or two single speakers in two rooms, you can then use the “group” feature to play the same source to both/all rooms, playing in sync. This is the Sonos strength: syncronised, multi-room audio. But if you want Beam, Era’s and Play:1’s in the same room, this is not supported. The Beam is already the three front channels and the Sub gives you a  3.1 system. Then the surrounds (whichever you choose to use) complete the 5.1 setup.

Therefore I can configure the Era 300 as surround with Beam and Sub mini, and configure the two Play:1s as if they were in another room, but physically always leave them in the same room.  This way, using multiroom audio they will all be playing in the same room.

Just be aware that you will get lip sync issues when playing TV Audio, if you group another Sonos Room(s) to your Home Cinema set-up.

Yes, but when playing tv source there will be a short delay (approx 70ms) for the sound from the “second” room, which will sound like an echo. There has to be a buffer, so the speakers can all play in sync, and playing in this way is not how Sonos is intended. I often play tv sound in the kitchen, so I can still hear tv audio whilst out of the room but the room and speaker is far enough away I only hear one speaker room or the other.

I agree with the posts above. If you are just playing music then the various speakers will be in complete sync. It is different though with TV audio.

If I remember correctly, among the app options there is the function that allows you to delay the audio of the speaker