The stability provided by the Sound City outriggers and isolating the speakers from the floor are two separate (but admittedly related) issues. As I have said before about the Townshend Seismic Pods, they may be used in place of the spikes provided with outriggers, and to great benefit. A set of the Pods used with an outrigger-style base is a great combo. As good as the Townshend Speaker Podium? I don't know, but much cheaper!
