Krell mono blocks and wilson watt puppy's

Thanks to all who gave me some great info. regarding the Goldmund mimesis 9.5 I was auditioning. I returned it due to age and price. I am know thinking of going with Krell monoblocks. The model I have not chosen yet, but am thinking the 350's or higher.

The question I have, if anyone knows is that I have run into problems with Krell in Japan if bought offshore. In Tokyo the power is 100v. 60 hertz I believe. I had a Krell preamp once that I believe would only run at 50 hertz (or vice versa). Does anyone know if that applies to the Amplifiers as well? The modification is expensive and with the strong yen I want to buy from the States and ship here.

Thank you for any advice.