For me this is no challenge as I'm an electronics designer and it would be trivial for me or an electronics tech to add a jack to the TV wired to the internal speakers.
For consumers you turn to sound bars that have headphone jacks. You don't get into converters.
Looking to use headphones with my LG TV while using my Amazon Firestick. The TV has only the following inputs (no outputs): Component video (Y, Pb, Pr), Mono Audio (red and white RCA), USB In, and a single HDMI In. That's it. And yes, it really does have no outputs -- not even a toslink/digital optical.
Given the research I've done on this, it appears impossible to connect headphones to the TV directly. I do have a soundbar -- which I can connect the headphones to directly -- but without TV outputs, it can't be directly connected to the TV. It seems that I can use a splitter/converter to convert the HDMI Input to an HDMI/RCA Output and hook that output up to the soundbar in order to use my headphones with the TV (but please correct me if I'm wrong, as I am no tech expert).
The problem then becomes using headphones with my Firestick, as the Firestick requires the single HDMI In port that the splitter would be using. So my thought was to get an HDMI to RCA converter to hook the Firestick up to the (Y, Pb, Pr) component video so I can use it along with the headphones/soundbar.
My question for you guys is would all of this work? And if so, would my performance suffer while using 2 different converters?