I know it does too, but I don't understand it. What exactly is going on with different powercords? What are the physics behind how a powercord effects a component. Is it simply that it gets the electricity more easily through better powercords, or does each powercord contribute to/detract from the electricity in some way that effects the sound (greater transparency, larger soundstage, etc)? Are there any guidelines for pairing powercords with components or is it trial and error?
