This is just beyond me. Nothing matters but the power cord from the receptacle to the component? The panel box, wire in the wall, transformer in the component that isolates the primary from the secondary, filtering in the component none of this makes a tinker's damn only this freaking 4 foot power cord?? Jesus Christ people learn how electricity works.
http://hyperphysics.phy-astr.gsu.edu/hbase/electric/ecircon.html#c1
http://hyperphysics.phy-astr.gsu.edu/hbase/electric/ecircon.html#c1