A question for technically astute

I have lived in countries using all voltages and it is a commonly known fact between amp designers that 220-240V regions perform better with most of their designs.

In addition, transformers that can cover the full requirement of the amp (hard to do, by the way) can provide more stable electricity and importantly de-couple it from the rest of the electrical installation in your home. I use transformers even at unchanged voltage to good results.

Gents I cant expand because I dont know why. But for some reason higher voltage seems to benefit the amps. This was told to me by the designers of Tenor, Lyra Connoisseur and I think BAT if I remember correctly. I keep in touch with the LC guys who are great. I will drop them an email and see.

When you consider electrical conductors (as in AC power cables), the ability to pass lots of current is directly related to the diameter(cross-section). If you need to be able to pass lots of current, you need fat conductors. But if the voltage can be increased, you don't need to pass so much current (again for the same amount of power), and you therefore don't need such fat cables.

This means that the power-handling capability of the same power cable will be increased by running it at 220~240V AC, as compared to 100~117V AC. The same applies inside the power amp (for the power supply input wiring and circuitry up to the power transformer). By running it at 220~240V AC, it is effectively "getting an upgrade."

The limitation on voltage handling of electrical conductors concerns physical spacing and insulator material (and thickness). Usually, the wiring inside a modern power cable (and also the power supply input wiring and circuitry up to the power transformer inside a modern audio component) should be able to handle 240VAC without difficulty.