Am I crazy????? Try THIS

the fact i have not seen the sp move do not mean it is not moving, it is moving back and forth in oppsite direction of the woofer. the mass of the air being moved in relation to the mass of all non moving parts of the speaker will determine how much along with a bunch of other factors, musical input would play a big part. with the right imput you could have them swinging back and forth with ease.

Yes...Like a child on a swing.

try to push a boulder. It doesn't move because the boulder push backed absorbing the energy.

goog point, Gregadd. so it is possable the speaker does not move at all.

most speakers are kind of tough to hang and make look nice without using a drill. the outriggers on my nht2.5i should make a good platform for hanging upsidedown. i might be able to find an I-bolt that will screw directly into the threded holes the outriggers use. the grills will install upsidedown to keep the name upright, without changing preformance. i can then put my sub directly underneath one of them, killing 2 birds with one footprint.

As I said, some people will continue to believe that music will set suspended speakers swinging, until they actually try it. Of course (unless you use three chains) they can swing if you get them started some other way, like a room fan.