Another trick that has worked fairly well for me in terms of tuning the downward bass port is placing a 11"x11"x3/4" piece of maple under each Druid. I tried fiddling with the spikes provided by Zu, but I can't seem to get them screwed in far enough to get the speakers base down to the 2 CD case height (about 3/4"). Also, I don't really feel like spending another $200 on Audiopoints or other spikes plus floor protection discs at this point. Anyhoo, the maple boards seem to do a good job of filling out the lower end, thereby, creating a more even presentation from top to bottom. I bought a couple of 5-1/2" wide 3/4" think maple boards, cut'em to size, glued two pieces side-by-side and voila! About $30 in materials.