I love my Townsend Bars, wouldn't trade them in for anything else. Couldn't tell you how they work, they just do. My 125 lb speakers float in the air, the sway when touched. Everything comes into equilibrium sound-wise for me.
Townshend Springs under Speakers
I was very interested, especially with all the talk. I brought the subject up on the Vandersteen forum site, and Richard Vandersteen himself weighed in. As with everything, nothing is perfect in all circumstances. If the floor is wobbly, springs can work, if the speaker is on solid ground, 3 spikes is preferred.