Thanks for the replies so far. I'd really like to avoid the use of step down (up?) transformers, I find they're an inelegant solution. I know some electronics shipped to different voltage regions are identical, aside from the power board. Where a switching power supply is not included (as seems to be the case with the components I own), I was hoping to convert the unit itself so that it was indistinguishable from the version that would have been released in this region. I do have a question out to Marantz too, but not overly hopeful of a constructive reply....