I am quite sure you are quite sane; just as I am sure there is no wheel visable when removing the small panel over the transformer. I have even downloaded the Service Manual, and there certainly is no hint about a "US only" versus a "rest of the world" power supply. Interestingly enough, the PCB to which the power cord is soldered

tooooo cool thanks for sharing

Many thanks for the suggestions and information (and quick replies, too). Wanting to believe that B&O might have anticipated customers moving about the world, it only makes sense that B&O equipment be automatically voltage sensing. But, maybe in 1991, only laptop computers (e.g. my company Dell) could do that? In any event, a switch (as joeyboygolf

I have a Beocenter 9500 (purchased in Seattle in 1991) that was converted to 220v in Budapest (by the dealer there) about four years ago (I then moved to Rome and it continued to work fine). While in Budapest, I purchased a pair of Beolab 3 speakers that also worked fine in both cities. I am now back in Seattle (to stay). The retailer from which I bought