Eurozone sickness and 230v single phase vs 240v two-phase.

For reasons we really shouldn't debate here, the Euro is weak and it's probably going to stay weak for half a decade or until the Ukraine conflict ends. Maybe longer.

This has made the average selling prices of European produced gear (at current FX) about 20-40% lower than US list for grey market imports to the US. While some manufacturers kindly install a mains voltage selector on the back of the box (CH Precision, for one) others insist that voltage conversion only be performed by the manufacturer or perhaps not at all.

Now, I'm cheap but I can afford an electrician. So the question that follows is whether audio equipment cares about the difference between 230v single phase vs 240v two-phase. And if so, what's the best way to make 230 single phase from 120 or 240 American power?