05-14-2010, 10:19 PM
I have both Zenith Cubes. The feet on both are 2" wide, but the length varies. The length on the 6S222 is 9 & 5/8" whereas the length on the 5S218 is 8 & 7/8". The basic design of both sets of feet is identical, so if you don't mind the feet being a little short on your 6S you'll be fine. You will have to drill some new holes in the feet. By the way, the 6S is vastly superior to the 5S, electronically.