Quick summary Flexson, a specialist in Sonos accessories, has ceiling mounts for the Era 100 or Sonos One, for a seamless and professional finish. If you've ever looked at a friend's fancy extension and wished you had hidden ceiling speakers, then this could be the answer. Flexson - known for its Sonos accessories - has an in-ceiling mount for Sonos speakers, so you can do it yourself. The advantage of using existing Sonos speakers is, firstly, you don't have to buy ceiling speakers, you can just use the units you already have. What happens when something goes wrong and you need to restart the Sonos speaker?