Adcom amps with better power input?

Have a hobby system which is bi-amped by 2 Adcoms(555II and
I have been astounded at the transformation really decent
short(20 inch)IC's and dual runs of 4x12 gauge OHNO speaker
cable(4 feet per speaker)has brought about.

My ? is,any A'goners, messed with upgrading Adcom on the power input side?(better cords,dedicated outlets)