That's because the threads have no beginning (or end)!
My son in Kansas City is friends with the developer of Modius. He has a pair of the tower speakers and they sound very good. The young man who developed the speakers worked with my son an KC so he(my son) was able to get a pair of the speakers at a good price before they actually went on the market. e-mail me if you want to talk to my son about the speakers.
email@example.com Gene Thomas