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.