If you can adjust the volume level of output socket on your audio source (Simply plug a wired earphones to test this) , you can try below -
- Step 1. Turn down the volume of your Bluetooth headphones as low as you can.
- Step 2. Turn up the output level of the audio source.
We are told that there are two kinds of audio output socket on TV. For one kind of output socket, you can adjust the volume level , but for the other kind you cannot.
So if you find you can't change the output sound level on you TV, you can try to contact the manufacturer of TV and find out the very socket that you can change the volume level.