Hi all, new owner of a pair of Beolab 9s here. Quick question about the mains cable for these: the manual says only use the supplied power cable (which I don’t have) and I can see that the socket is handed so the cable can only be put in one way. So - does it matter what the polarity of the supply is if you use a standard figure-of-eight cable and if so which way round? Any help gratefully received. Dave.