Sonos is working on a brand new speaker that could arrive within weeks, according to new filings. Documents made public by the Federal Communications Commission show a brand new speaker that bring a whole host of features to its existing line-up. But those features remain mostly under wraps: the filing is redacted and so many of the most important are hidden. Clues inside the filings appear to indicate what the speaker could be intended to do, however. The filings, first reported by Variety, identify the new speaker as "S18" and describe it as a voice-controlled speaker that can connect using WiFi or Bluetooth and can be controlled with a host of microphones that listen to their owner.