Adcom amps made in japan?

Im looking at mark 2 545 and 535, i noticed selling my non mark 2 people would email me asking if it was made in japan.

Now some of the ones im looking to buy are made in japan.

Before I purchase can someone please inform me if their is anything different, wrong, or issues with the ones made in japan? Are voltages different or anything?
Make sure the equipment is manufactured for use in the USA.
120 volt 60 Hertz. (I assume you live in the US.)

Equipment manufactured in Japan is a hell of a lot better than equipment made in China, jmho.......