Samsung PN51E6500EFXZA - Manual (Page 104)

speakers and the speakers attached to
your audio receiver. If this occurs, set
the TV to External Speaker .
N When Speaker Select is set to
External Speaker , the TV’s speakers
are turned off. You will hear sound
through the external speakers only.
When the Speaker Select is set to TV
Speaker , both the TV’s speakers and
the external speakers are on. You
will hear sound through both.