Have had a few of the amp's , they needed new cap's from the factory! just install good pollys in the signal path , their are only 2 eltrolytic's to worry about and a non polar easy fix , more like 500ma bias
IT IS A FET AMP YOU KNOW ! ONE OF THE BETTER ONE'S , TURN THE TRANSFORMER SIDEWAYS INSTALL 4 , 24000UF POWER CAP'S FIX THE INPUTS DONOT FORGET THE INPUT GROUND RESISTER ON THE CHANNEL NOT FLOATING GOOD LUCK !!
IT IS A FET AMP YOU KNOW ! ONE OF THE BETTER ONE'S , TURN THE TRANSFORMER SIDEWAYS INSTALL 4 , 24000UF POWER CAP'S FIX THE INPUTS DONOT FORGET THE INPUT GROUND RESISTER ON THE CHANNEL NOT FLOATING GOOD LUCK !!