An FCC filing points to new Sonos headphones coming soon

It looks like we'll be getting a successor to the Sonos Ace headphones sometime this fall, which was hinted at by CEO Tom Conrad during a third quarter earnings call. As reported by What Hi-Fi?, an FCC filing by Sonos, Inc reveals details about upcoming wireless headphones with the model number S52A. In addition to the S52A designation, one of the submitted documents shows an oval diagram - likely the ear cup - marked with the name Sonos Ace Ultra, although that name isn't listed anywhere else.…