Just recently started having issues with my arc ultra! We have to have the volume up at like 50+ to get a decent volume out of the arc! Before we wouldn’t have to have it any louder than 20 to get decent volume. We can talk over max volume on the hdmi and music through the app! Very frustrating! I called Sonos and they had me run a diagnostic test and said everything is ok. But I don’t know how they can tell when the volume is at 20 or 40 or max, how loud the volume really is or should be. I really would just like to send it back and get another one! Something is definitely wrong though.