I personaly wouldn't use a device like this to place under any audio equipment.What you have here is basically a shock absorber with all the damping fluid gone.This thing will continue to osculate long after any bump or floor vibration causes it to move.Also it will move in two directions,side to side and up and down.I cringe at the thought of somebody placing these under +100 lb speakers.Footers like this need to be dampened.But hey the price is really CHEAP.
Isolation Springs Deal
Any value Audiogoners looking for a great audio value? I have a set on these under my Raven Amp with nice results and more on order.