Hi @Directlaw, Thank you for reaching out and welcome to the community. First, I want to ask about your referring to the Sonos Beam or Playbar soundbar? Because on the mounting points for the Sonos Arc. It differs between these two other soundbars. You may check this link about Mounting Sonos products on the wall for reference.

Let us know what you have in mind with the advice above.

The Sonos community is always here to help.