running musical x-150 230 volt amp on 110?

i recently purchased a MF x-150 integrated for my gf. (i'm giving her my paradigm 20's to go with it.) anyway, it's set up for 230 volts. (that's right... 230!?) anyway, the seller promises that it works with 110, but i am hesitant to do it. in fact, i'm worried about *his* doing it when testing the amp.

should i be worried about running it on 110, given that it does, in fact, work on that voltage?

should i buy a converter with sufficient wattage rating?

or, since this unit is also sold in the u.s., is there some fuse i could switch internally? (the seller assures me of this, but doesn't know any more details.)

thanks very much.