Power Cords & effect sound?

[mah]

If an expensive power cord has made a significant improvement to the performance of your audio system you may be interested in this site:

Unique Audio Products Available From ESP

[bfish]

All audio electronic devices have an internal power supply that filters, rectifies, and provides the requisite voltages (a good portion of which are DC). With the possible exception of a few TT drive motors, nothing runs directly from the AC supply voltage. What comes out of that power supply is what matters.

Added;
People that freak over their AC supply quality should go back to batteries... easier, cheaper, quieter (than the suggested "fixes"), and completely off the grid.