Moving to France

Yes if it uses DC power supply the Hertz wouldn't matter. 

I lived 3 years in mid-France with an Oracle Delphi. I ran all the front end components off a smaller transformer wired through a US power strip using the US power cords. Be sure to buy a $6 test plug to verify you have plugged in the transformer into the 220v to get the right response on the 115V tester, and mark it so it is plugged in correctly to the 220 v outlet each time. I bought industrial transformers from my company's "matierels usees". I used a bigger transformer for my amp, but I encourage you again to contact the manufacturers to see if a local tech can modify the primary transformer connections.

Hilde, you wrote, "They need to think hard about who they are and why they choose to act that way. They demean themselves."

I wonder about "demean themselves" - as Bob Dylan said - "never tumbles, got no place to fall."

stumbles

I lived in Paris on Rue Breguet. That’s where I fried my American made Grundig. Until then, I thought all Grundig named products were made in the EU. Anyhow, I’d wait until I got to France and then I’d contact one of the audio stores. There are many in Paris and would think that other larger sized cities would have them also. Products in France are equal in price to those in the states, despite the euro to dollar comparison.