Yea, I think you get the idea. I don't have the space for the power amp, or the way to move it around when the situation arises. If I did I'd buy one right now, haha. I was considering building a couple of "Safe" boxes for higher voltages(low/high frequency) in a compact form. I don't know if 60Hz transformers would work at those frequencies but I suspect the current being so limited the heat might not be an issue. Alternatively 400hz, or custom transformers.