Aha. I have the Aragon 24K with the IPS, the Improved Power Supply. This wasn't standard, you had to buy it separately. It was said to improve upon the standard powersupply, which you probably have. I have seen thatone in real life, so I can't tell you how to open it. But I'm sure there's a way to open it, and I'm also sure there's a fuse inside. There is an entire forum dedicated to Aragon gear, so you might ask your question there:
http://forums.klipsch.com/forums/20/ShowForum.aspx
http://forums.klipsch.com/forums/20/ShowForum.aspx