An FCC filing dated August 10, 2026, identifies a new Sonos “Wireless Headphone” under model RM052, with internal references to S52A. Lowpass, which first reported the filing, says the headphones are expected to be called Sonos Ace Ultra and may arrive in five finishes: Greige, Shadow Black, Agave, Blush and Sand. Related Reading:The Original Sonos Ace Were Good Headphones With a Sonos ProblemSonos Ace Wireless Headphones (2024 model)When the original Sonos Ace arrived in 2024 for $449, there was plenty to like. Could the Sonos Ace Ultra Actually Succeed? If the reported Ace Ultra fixes that, Sonos could have something much more interesting than another premium Bluetooth headphone.