Samsung HW-Q950A: Rear Speakers Stop Making Sound? - TRY THIS - YouTube
LG Sound Bar S80QR PDP
Looks like the Samsung HW-Q90R soundbar got updated to have eARC finally (firmware 1010.5). : r/Soundbars
Don't make the mistake i did with the Samsung HW-Q950T ... if you're thinking of buying it make sure you have space behind the couch for the rear speakers otherwise the channels