This is not a problem. Use an appropriate step down transformer that plugs into your house AC line, be it 120V or European. I have 3 different vintage Japanese turntables each happily running off a separate 120V to 100V step down transformer. Each step down transformer cost me not more than $50 or $60-ish. They’re to be found for sale on eBay. And that’s only if the SP10R is not already adaptable to 120V input (in the US) or whatever. My Victor TT101 was apparently sold originally via the US military and takes any of the standard voltages, apparently because of its switchable power transformer.
You sure do NOT need one of those $600 Monarchy things, which is probably a power regenerator, a la PS Audio, etc.