I'm sure if you induce enough RF energy onto the cable feeding a speaker then it will move. Bear in mind, at higher frequencies you don't need to move a cone much either.

A friend of mine used to set burglar alarms off with his in car CB rig which was attached to a massive burner. It got to the point where I used to try and cover my privates every time he keyed up for fear of radiating something I might need later on.