I watched a technician do this twice with my 2805's. Once to replace the binding posts after I broke two from tightening. The other time was to fix some electronics.
First take off the very top plate on top of the speaker. This should pop off, it is held in place on each end.
Then you can get to the bolt that holds the pole in place from the top. Once you remove that bolt, the pole should become loose and you can then move it out of the way to take off the bottom plate. You don't have to remove the pole from the bottom.
Good luck.
First take off the very top plate on top of the speaker. This should pop off, it is held in place on each end.
Then you can get to the bolt that holds the pole in place from the top. Once you remove that bolt, the pole should become loose and you can then move it out of the way to take off the bottom plate. You don't have to remove the pole from the bottom.
Good luck.