I use Sennheiser HDR170 wireless headphones to listen to TV while other family members listen simultaneously to the TV speakers. The last time I bought a TV I found that with some manufacturer's TVs e.g. LG, Samsung, plugging in the headphone to the TV socket muted the TV speakers. This made the TV unsuitable. I found a model from Sony and Panasonic where this did not happen and TV sound output was adjusted normally without affecting my headphones. Does anyone know if all current Sony and Panasonic models are the same? and are there any other makes that have this facility - i.e. headphones NOT muting the TV speaker.