luisma31, sorry, I got confused with initial post about TT problems. You keep saying "unplugged from pre side" but you probably mean that shield was disconnected, otherwise what are you listening to if nothing is connected to pre? I suspect that cable might create ground loop. Lifting shield on pre side might still produce buzz if shield touches connector shell. Anyway, there is very little chance that anybody can help you if Ralph couldn't. I use XLR cable grounded at both ends between DAC and power amp and it is dead quiet.