Removing a stereo pair
Tap the “Rooms” tab.
Tap the Pencil 
icon to enter Edit mode.
icon to enter Edit mode.Tap a Stereo Pair (a room which contains two matching HEOS speakers) to edit the group.
Tap on the Stereo Pair switch to return the paired speakers to two individual speakers.
Tap the Back arrow 
to return to the list of Rooms.
to return to the list of Rooms.Tap the Check Mark 
icon to exit Edit mode.
icon to exit Edit mode.