I have the same problem!  I have definitely read somewhere on Beoworld that they unscrew but can't find the reference; I think it was mentioned by Lee (former site owner).  I have tried several times (every house move) but cannot get them apart.  Maybe WD40, or application of cold/heat, or percussive shock???  Good luck!!

Hi, I just unpacked my set from the original B&O packaging and I can confirm that the poles are simply screwed into the bases.  As Guy suggests, WD40 (overnight) might help. Bill

Thanks both for your replies Bill - they're not left hand threads are they?

No they are not, they screw in clockwise (right hand) and screw out counterclockwise (left hand). The aluminum poles are threaded and screw into the threaded iron base.  WD40 for a few days may be necessary to remove them without damaging the aluminum threads.  I would apply from both the top and bottom.  As Guy mentioned, heat may help (applied to the iron base from the bottom). Take your time and let the WD40 do a lot of the work so you don't damaged the aluminum threads.  Applying some type of anti-seize thread compound would be a good idea when re-assembling.

I agree with much of the advice given by others. Also, consider heating the iron base (and indirectly the aluminum tube), then applying something like circuit freeze to the inside of the tube. The idea is to drive the maximum amount of thermal expansion difference between the parts. The high thermal conductivity of the aluminum should help here. Combine this with the penetrating oil and run multiple thermal cycles. There may be so much galvanic corrosion in the threads that they may not come apart without damage. This may be a case where it is better to just leave them assembled. If you are obsessed with getting it apart and all else fails, the tubes could be cut off and everything rethreaded. The stands would be a bit shorter, but you would be able to reset the clock on the corrosion cycle ;-). Glitch