Confused about the 9V stepdown thing

[D-Lite]

Well the reason I'm concerned is because it actually states "100v" right on the AC adapter and pumping an extra 20v just doesn't seem all that healthy to do. I'd really just like to be on the safe side and get a step down transformer but I can't seem to find a 120v to 100v anywhere online.

I have a stock of them and I can't remember where I got them.  Cost me about $25 each.  Switchable, nice. 

But regarding the 120 v. 100 thing, it really doesn't matter much.  There is a 10% tolerance (approx at least) which brings them near equal.  And it's really all about the amps anyway.  The power comes in and goes through a regulator that drops voltage to 5V for most of the board as it is, so it's no problem.  As someone said, just a bit more heat.

[Soviet Conscript]

the voltage diffrence isn't so great to have a huge effect like everyone has said. the wear caused by the extra heat is most likely negligable and if it did shorten the systems life it would probibly in hours or maybe days.

that being said i still use a converter for my jp systems

http://www.voltageconverters.com/japan_voltage.html

i just got the cheapest one, don't really need anything more heavy duty if your just useing it for systems.

[Air_Zonk]

I'm picking up one of those converters for sure. Thanks for the link!!