Seems to be a few threads here on this general topic. I, too, am interested in experiences of others. I have a pair of PSB Stratus Goldi (floorstanders). I can tell you that I have a very common carpet and padding over a joist and plywood floor. As typical in California, there is no basement beneath but, rather, a crawl space. When I first brought the speakers home, I was anxious to give a quick listen and hooked em right up without spikes. They sounded good, but a wee disappointing with a "muddy" bass. Plus, I could feel the flooring vibrate beneath my feet, 20 feet away from the speakers. I installed the spikes and the improvement was striking. No floor vibration and a much tighter and accurate bass response. The addition of the spikes was CLEARLY benefical, so I know elevating them off the flooring is a must. Now I am experimenting to find the best height for the spikes and wonder whether adding cones, or the like, would provide even more benefit. good luck
