Hi Jene,
What you need is an external transformer to step up the US voltage to UK Voltage. The power rating of the transformer should be a minimum of 100Watts and you should be able to obtain one from Radio Shack or similar electronics store.
Example : http://www.radioshack.com/product/index.jsp?productId=2104179
You will probably also need an alternative power cord, since I expect that the one supplied with your KN2600 will terminate in a UK 13Amp plug
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Willum

After silence, that which comes nearest to expressing the inexpressible is Music.
Aldous Huxley
( especially when the music is played on a KN7000....)