Some televisions have a fixed audio output and a variable audio output.
The variable output’s signal strength is set by the volume setting for the TV’s speakers. If someone else is watching at a low volume, the signal to your listening system will be low as well.
The fixed audio output’s signal strength is not affected by the volume setting for the TV’s speakers. This output provides a consistent, strong signal level to external devices such as your new listening system.
Additionally, some TVs have an audio output that can be set to either fixed or variable – via either a switch on the back of the TV or a menu setting navigated by the TV’s remote control. Please consult the TV manual for instructions regarding your TV’s specific brand and model.