I have two pairs of Beolab 6000s.  One is used as rear speakers in a surround setup, and the other as the two main speakers on a spare TV.  These pairs were both purchased used a while ago.  I noticed that the two speakers in the surround setup were distorting a bit during loud volume, so I wanted to switch them.   When I did, I noticed that the mains plugs for each are different.  One has a mains adapter that has two oval type shapes, and the other has an oval plus one with a flat end.  I can't just switch the mains cables easily without some work as they are fished through the walls (wall-mounted beolab 6000s).   Has anyone noticed that there are two types of mains cable shapes?  Is there an adapter of some sort??!?!

There is no problem. you cable with 2 oval shapes will fit the speaker with one oval and one square connector.. Just plug it in... I have the same oval-square connector on my bl7, and i use a round-round cable without issues.

/Weebyx

OK I used your solution but they didn't fit the other way around (square end mains cable in oval-oval recepticle.  I just ended up using a knife to shave off the corners of the square end and it worked.  Strange....never realized there was different connectors.

I have BL 4000, 8000 and all square.