Adrian, thanks, that's an excellent idea. I came across one other way, the "cheaper" one. I picked a pair of 20lbs rated OmniMount ceiling brackets. They come with a plate that can be attached to the speaker in case it has no threading. I may use a combination of a peace of wood (I think 3/4 plywood would work well) with the mount/plate.

Solar, that's just a basement, majority of it came finished as a single 20x30 room.