Using Multiple Speakers
Setting up a group
Group multiple speakers, connected over the same network, to play the same music via the speakers.
1.On the main screen, touch 
at the top left to display a list of speakers.
2.Touch 
next to the speaker name.
3.Touch Group. If you have more than two connected speakers, select the speakers you want to set up as a group, and then select Done.
NOTES
If two speakers are available, touch Group to automatically group the speakers.
You cannot use Group with Bluetooth or a TV SoundConnect connection.