The specs say 100-240V, 50/60Hz.

100V is not that much of an under swing (10% or so) from house 110V in the US. I have seen swings bigger than that in some venues (I used to carry a meter when playing new places when I was in a band with a lot of lights!) when things like the A/C kicked in.

Has it happened again since you penned this topic?
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An arranger is just a tool. What matters is what you build with it..!