There are rare pieces of audio gear that don't like split phase. Most have no compatibilty issues and European gear would be even less likely to have problems than American because of international standards.
All electric stoves and dryers use 240V (+120/0/-120) in US/Canada. The two hots are 90 degrees out of phase (inverse sine wave) and cumulative. Oddly, this is still, most often, called single-phase. The neutral only carries the difference ("garbage" for a single load) between the hots. 3 phase is used in industrial/commercial motors where three hot 115V, or more, at 60 degrees phase add up to 208V, or more. 3 phase has no neutral and, sometimes, no ground.
An adequately sized transformer would isolate and filter AC and often sounds better. They're not that expensive, if you know what you're looking for. It only has to reproduce a very narrow 60 Hz bandwidth. Converting from 60 Hz to 50Hz is usually not necessary for audio gear.
All electric stoves and dryers use 240V (+120/0/-120) in US/Canada. The two hots are 90 degrees out of phase (inverse sine wave) and cumulative. Oddly, this is still, most often, called single-phase. The neutral only carries the difference ("garbage" for a single load) between the hots. 3 phase is used in industrial/commercial motors where three hot 115V, or more, at 60 degrees phase add up to 208V, or more. 3 phase has no neutral and, sometimes, no ground.
An adequately sized transformer would isolate and filter AC and often sounds better. They're not that expensive, if you know what you're looking for. It only has to reproduce a very narrow 60 Hz bandwidth. Converting from 60 Hz to 50Hz is usually not necessary for audio gear.