Sonos Amp. Quick look at an install we performed with ceiling speaker retrofit pictures. - YouTube
Set up your Sonos Amp | Sonos
The Ultimate Guide to Sonos Ceiling Speakers - LeslievilleGeek TV Installation and Wire Hiding Experts
SONOS User Guide | Roam
Amazon.com: HumanCentric Wall Mount Compatible with Sonos Amp | Mounting Bracket for Sonos Wireless Amplifier | Mount Sonos Amp in Any Direction : Electronics