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Hi , I`m Jack Perhaps I can help you with this problem but first could you tell me what is connect to this tv beside the sound bar ?
Cable box,satellite,dvd,games etc. ?
One thing is for sure , this tv cannot drive external speakers alone without some sort of amplifier so you may be getting into a surround system now .
Unless of course you wish to use the wave radio auxiliary (AUX) input in which case you need analog left/right audio out either on the tv or the cable box /satellite box .
You did not give me any model numbers so i`m giving you the possible scenario`s here but my guess is that the sund bar is already using whatever audio out was available on the tv so that leaves the cable box as source of sound
something somewhat like this with that type of cable , click the link below ;
That is a 3.5 mm to rca stereo cable that can be found at local stereo/tv stores
By the way , if that link opens a login window popup then just close it with the upper corner X or the "no thanks . continue to view"The picture is behind that .
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