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Hey all,

I just upgraded my Sonos Arc to the Arc Ultra. While I was hoping it would be a simple swap out using the cables I had hooked up to the Arc, something has gone haywire with the HDMI cable I was using (Monoprice 8k Certified HDMI) and the eARC handshake between my devices, tv, and soundbar are causing issues that cause the sound to be downgraded to non-Atmos or 5.1 tracks. I’ve troubleshot this all week and finally just decided to try the Sonos provided HDMI cable that came in the Ultra box, and used that from the eARC port of my LG C1 TV to the Arc Ultra, and that seems to have fixed the issues (at least so far). This makes me think that I need to replace the previously used HDMI cord and am wondering if anybody has suggestions for what they use. 

I need at least 10’ to be able to route it through my wall, and again, it needs to be in-wall rated.

Appreciate your help in advance.

Just spent 10 minutes looking for the HDMI cable requirements, didn’t find them.

Maybe read the stamped info on the Sonos cable and match it?

I’ve had good luck with Monoprice in the past but not bought an eARC cable from them.

I had a setup and bought some expensive HDMI cables and was having issue with glitches in 4K video because I was at 15 ft.  I know that is different than audio, but bought the braided 8K Monoprice cable and the issues went away.  Good luck. 

The same thing happened to me! The Sonos ARC Ultra fixed the problem! I was using Maya Zeskit Premium HDMI Cables. I just bought a Projector so forcefully I will have to go back to Non Atmos HDMI cables 25 ft so I bought Highwings 4K HDMI Cable 20FT, 4K... https://www.amazon.com/dp/B07ZVCKBFL?ref=ppx_pop_mob_ap_share

I believe for Sonos anything that can handle HDMI 1.4 and above is OK - below does not do HDMI-ARC. You don’t need great bandwidth’s because you are transporting sound, not image.

I believe for Sonos anything that can handle HDMI 1.4 and above is OK - below does not do HDMI-ARC. You don’t need great bandwidth’s because you are transporting sound, not image.

Yeah I really don’t k ow why the cable I used would have suddenly gone “bad” but over a week after swapping it for the Sonos provided cord, I’m convinced it’s something either with the cord or the Ultra itself. 
 

I’ve gone ahead and ordered a few random hdmi cables to try and test various brands, types, speeds, etc. next week. If none of them work I’ll be convinced it’s the Ultra itself and probably try and swap it at Best Buy where I bought it. 

 I think you just want to make sure the HDMI cable is HDMI 2.1.  Mine is a very reasonably priced one from Amazon.  I don’t have the Arc Ultra though so maybe that’s not an answer to your issue.  My setup is Sony TV eARC to Sonos Arc.

 I think you just want to make sure the HDMI cable is HDMI 2.1.  Mine is a very reasonably priced one from Amazon.  I don’t have the Arc Ultra though so maybe that’s not an answer to your issue.  My setup is Sony TV eARC to Sonos Arc.

Yeah; the cable I was using is 100% an HDMI 2.1 certified cable and was the one causing issues even though it worked with my previous Arc soundbar.

And, yeah, probably overkill getting that many cords to test out, but just want to be sure! Fingers crossed one of them solves the issue so I can get back to just enjoying the Arc Ultra!

I’ve seen counterfeit cables, look like the real brand but are just junk. No good way to avoid that scam aside from using a trusted source.

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