Removing a stereo pair
Tap the “Rooms” tab.
Tap the Pencil 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.
Tap the Check Mark icon to exit Edit mode.