After months of research, I finally managed to get wireless rears for the 5000 to turn it into a true 5.1 Atmos system.
Since my 5000 is connected to the Roku Ultra, I was wondering whether I could do something with the optical output on the Roku.
While browsing the Best Buy site, I chanced upon the Insignia wireless rear speaker kit; link below:
The transmitter module comes with an optical input and decodes Dolby 5.1.
I connected the transmitter to the Roku with an optical and Viola! I got rear surrounds!
I watched the UHD and Atmos "Everest" again on VUDU and this time the snow was swirling all around me with thunder at ceiling levels amazing.
Watching music videos on Youtube was inspiring as well with full 5.1 channels.
I did some 5.1 test videos on Youtube and the rears worked as there were supposed to.
You are able to control the volume and delay on the rear speakers so a bit of manual tweaking is required as there is no master volumn controller for the 5000 and the rears. I'm willing to live with this slight inconvenience to finally get rear surrounds for a damn good Atmos soundbar in my opinion.
I'm now researching whether I can buy some better satellites to replace the insignia ones.
However.... there is caveat for those hoping that this method will work with a Blu Ray player.... I'm not sure.
The reason why this is working is due to the fact that the Roku box does not decode any Dolby or DTS signals.. It just passes through audio and the 5000 decodes Dolby Atmos/DD+ through HDMI while the Insignia box decodes the rear channels of the Dolby 5.1 signal from the Optical. I believe Optical can't do better than DD.
I do not think you can do the same for a Blu Ray player as the player itself decodes the audio signals.
AND for those rushing to buy Roku Ultra boxes, unfortunately Roku has removed the optical output from their new batch of Ultras. I believe this started last Nov. So you really gotta get the earlier models released.
Hope this help those who really need 5.1 from their 5000.