I used a Skullcandy "Hesh" headset and a Sony soundbar with this LG TV (50UK6300PUE). It worked great for a week, then it suddenly didn't.
From the Sound menu, I am not able to select Bluetooth from the "Device Selection" because it's grayed out (from the Sound Out menu). It will search for the device, but the TV won't detect it. I tested the headphones with my iPhone and it works great. Then I disconnect and try on the TV, and it won't find it.
I haven't tried resetting settings, but hopefully I'm just missing something.