I have 2 Sonos One SLs which I have owned for approximately 12 months or more. I have recently moved them to my desk and have paired them in stereo. One speaker is always lower in volume than the other, which I can tell as the stereo image (on song I know intimately where the voice should be dead centre) always favours one side. This needs a channel balance adjustment of about +7 in the app to correct. I am certain it is a problem with one of the speakers as I’ve swapped the them left to right and the balance issue also switches from left to right. I have reset both speakers and set them up again and the problem persists. It is present whether streaming using the Sonos App or via airplay.

While I can correct with a balance adjustment I’d prefer to not have to. Do I have a faulty speaker, or is there a setting (related to volume limits) that has someone gotten baked into one of the speakers that has survived a factory reset.