@ditusa , I thought you were living in USA, voltage sensing or switch mode power supply/analog switching amps just like Nuforce design amps works any voltage worldwide are not my main concern. I'm moving to USA soon ,planning to take all my gear with me do not want sell my we91 amplifier which is 240 volt that's why raise the question , in my humble opinion audio equipment regardless of how hungry or not performs better 240 volt operation.