Sony Bravia KDL-40W2000 Operating Instructions Manual page 26

Dual Sound
i Speaker Link
(headphone speaker
link)
Tip
"Treble", "Bass", "Balance", "Auto Volume", "Surround" and "BBE" cannot be used for headphones and audio output sockets.
26
GB
Selects the sound from the speaker for a stereo or bilingual broadcast.
"Stereo", "Mono": For a stereo broadcast.
"A"/"B"/"Mono": For a bilingual broadcast, select "A" for sound channel 1, "B" for
sound channel 2, or "Mono" for a mono channel, if available.
Tip
If you select other equipment connected to the TV, set "Dual Sound" to "Stereo", "A" or "B".
Switches the TV's internal speakers on/off when headphones are connected.
"On": Sound is output only from headphones.
"Off": Sound is output from both the TV and headphones.