Yes, they look very wobbly. You must find a way to secure them to the wall. Maybe wall ties or velcro straps? Or both?
It might be a pain to find a way that doesn't mean damage to the cabinets but it's probably going to be the same for any floorstanders out there.
Maybe it's high time manufacturers of tall speakers built in some easy and discreet means of passively securing them.
I was actually considering using some travel straps (colour matched of course) to give my speakers some protection against being accidentally knocked over when not in use.
Your situation is obviously more urgent.
If you don't have grilles, then a change of speakers is unavoidable. Some of those shorter Wilson's look pretty stable.
It might be a pain to find a way that doesn't mean damage to the cabinets but it's probably going to be the same for any floorstanders out there.
Maybe it's high time manufacturers of tall speakers built in some easy and discreet means of passively securing them.
I was actually considering using some travel straps (colour matched of course) to give my speakers some protection against being accidentally knocked over when not in use.
Your situation is obviously more urgent.
If you don't have grilles, then a change of speakers is unavoidable. Some of those shorter Wilson's look pretty stable.