If your moving to Europe and your organization is paying for the move, then perhaps a weight/price allowance would accommodate your speakers and a car or two. Spent many years overseas and have dealt with a lot of audio equipment during that time, A lot of source audio equipment (preamps/cd players/dvd players/surround receivers) have 120/240 switchable power supply. You can easily see this on the back panel where the plug connects into the device. Even some older direct drive turntables, Technics, Denon have a switchable power supply. My Deon DP62L has this feature. Modern belt drive turntables with outboard quartz driven Power supplies should have a means to select either 120/240. Most often, a turntable with this feature will use a different size belt for 50 herz vs 60 herz for proper speed. Remember, anything mechanical with speed requirements more often requires a proper frequency to operate. Conversely, non mechanical devices, amps, preamps, can use a step up/down transformer with no problem with US or European equipment. I used an tube phono amp in Germany with a transformer for several years without any issues. There is transformer hum associated with the use of a transformer though.