Rel subwoofer voltage

I am looking at buying one or two Rel subs for my stereo setup...problem is I am stationed in Germany and due to head back to the US soon.  Why is that a problem?  If I buy them over here they are 220.  Looking through the user manuals, however, it almost looks like on some of their subs (T9x etc) that it is just a fuse change.  My Bel Canto preamp only needs a fuse change to go from 220 to 110...maybe it is the same.
Any people out there more intelligent than I on the matter?  I could wait, but I would rather be listening to that bass.