SOUND 4201 Speaker Wall Mount for Sonos One & PLAY:1 (black) | Vogel's
Amazon.com: Eximus Speaker Wall Mount Bracket for Sonos One, Sonos One SL and Sonos Play:1 - Adjustable Tilt and Swivel for Optimal Audio Quality- Black Finish (Mounting Hardware Included) : Electronics
Wall bracket for KEF LS50 Meta and LS50 Wireless Ii