Hi All,
I have a very similar setup to what you are after (Samsung UE65D8000) and the Beoplay S8, my intension when I purchased the S8 was to plug it directly into the TV via the headphone jack however when I tried I got a rather annoyed buzzing noise coming from the S8, this was using just the included audio adaptor to 3.5mm directly into the Samsung headphone slot.
Of course I wasn't going to leave it like this so a few days ago bought a Yamaha RXV-645 Amplifier thinking I could plug the stereo leads directing into the output of the amp and then hook all my peripherals up to the amp via HDMI (TV, Apple TV, PS4, Sky HD etc.) however I cannot get anything to come out of the S8 at all - I know everything is plug in correctly, there are hundreds of settings on the amp but I don't think any of them are precluding the sound coming through. Today I've gone out and bought a phono lead to plug in the phono port on the front of the amp, from here I've bought a lead from the B&O 3.5mm adaptor into this - nice again, I'm back to the buzzing noise when the S8 plays anything.
I know the S8 works fine because when I plug it into my Mac, iPhone or iPad it works perfectly - I've spent almost over £1500 so far and have got a system that doesn't work. I'd love to know if anyone has any ideas or tips, I've spoken to people at B&O, Richer Sounds, Tandy, Maplin and no one seems to have the technical knowledge to be able to advise...
Thanks, Jack