As an alternative to 300 pounds for a conversion, pick up a used PS Audio P300 here on Audiogon. You can reconfigure the P300 internally to run off 220v, but you can still output 110v, and set the Freq to 50 Hz.
Krell HTS Change from 60 to 50Hz
Does anyone know how to change my US purchased Krell HTS to work in Europe on 50 Hz? I am using a 220V to 110V step down transformer to power my US spec HTS. Unfortunately I get a "Frequency Error" message when I power it up. I presume this is something to do with European mains frequency being 50 Hz versus 60 Hz in the States. Does anyone know how to set the HTS to run at 110V/50Hz or 220V/50Hz?