6 free Kemper Profiles of this modded JCM800 are available for download at our Amp Mods page. https://headfirstamplification.com/amp-mods
Essentially it's a JEL spec JCM800 with a front end high voltage FET boost and 3 way Jose clipping option.
Full run down of the amps tones and also the mods are here, enjoy!