Questions # 3-6 for JohnnyC's initiation process

Since it is part of the initiation process, JohnnyC needs to answer a couple of questions asked by the house members so, here are mine:

OK, we need a little imagination for this one.

JohnnyC, imagine a beautiful little Sony hi-fi system that leads a carefree life in a big northern German city. All it needs for complete happyness is ~220V and some lovin' by its owner. You have to know, the owner loves it very much because she bought it with her first own money and because it sings more beautifully than a flock of sparrows on a warm april morning. Now, the owner plans to move to a country far far away and that worries the little hi-fi system because it is afraid that it might not get enough to eat since the systems in that country are usually set on a crazy ~110V diet.

So, my questions are:
What is needed to make the little hi-fi system happy in its new home?
Say it needs some sort of current transformer - will it still sing as beautifully and powerfully as it did back then in that northern German city?
Will the transformer make disturbing noises?
About how much will the transformer cost?


"Help me!"