I am also asking a question. Could someone explain the electronics on how a power cord upgrade can improve the incoming current from a house outlet, from a breaker panel or, for that matter from the street. I can understand how alt current can be 'cleaned up" as it were - voltage stabilzed, freq regulated etc. but that's a diffferent matter, and I thought that's what a powersupply in a pre-amp or amp deals with as it converts current to DC. Thanks.