I HAVE HEARD BOTH OF THESE AMPS AND I AM HERE TO TELL YOU THAT THE BOULDER IS A FAR SUPERIOR AMP!! I OWNED THE CELLO REFERENCE AMPS (4 OF THEM) AND I AUDITIONED THE BOULDER REFERENCE AMPS WHEN BOULDER BROUGHT THEM TO MY PLACE AND THE DIFFERENCE WAS STUNNING!! THE BOULDER WAS EFFROTLESS, DETAILES, DELICATE, POWERFUL, CLEAN, CLEAR AND MUSICAL WHILE THE CELLO HAD NONE OF THOSE TRAITS!!! THE CELLO WAS POORLY MADE, POORLY DESIGNED, LACKED EVEN THE LOW RATED POWER THAT CELLO CLAIMED, THEY WERE BRIGHT, HARSH AND NASTY!! AND I OWNED 4 OF THEM! THE BOULDER AMPS WERE JUST IN ANOTHER CLASS BY THEMSELVES! AND I WAS OPERATING THEM IN THE 110V ,ODE AND I AM SURE THEY WERE EVEN MORE FANTASTIC AT 220V. I BELIEVE THIS BOULDER AMP IS THE BEST IN THE WORLD AND MAYBE THE BEST AMP EVER MADE! (BOULDER 2050 MONOBLOCKS). KEN BECKLES
