Basically, I have the Infinity Primus PC350 center channel speaker and it came with these four tiny little rubber feet. In practice, I'm guessing it helps to decouple the speaker from the panel I have it placed on (which is attached between two regular wooden cabinets from Ikea). The space between my center channel and HDTV I was trying to make as minimal as possible, not to trade-off sound (height of center speaker) for comfort of watching. I overcompensated a little and literally, without the rubber feet, it fits. Do those little rubber feet make a difference or not? It would suck if it does as it would kinda defeat the purpose of all my effort but if so, how much so? Thanks guys.