Um, actually not true for the eMac, there is a 'eurpoean' model which has an LHR module, the manual states:-
Note: This part is used in Europe for line conditioning...
Also have a look on Apple's Support>Specification pages for the eMac, you'll see it does not have a switching power supply. Step down transformers are available and since eMacs don't use KWs of power, they need not be too big.
Good luck - hope that helps and you enjoy your stay in (or move to) Europe.