Stevemj: Thanks for the common sense approach. A further deficiency of Jon Risch's "explanation" that Kevperro posted is that Risch assumes that the conduction angle in the primary of a power amp's peak-rectification power supply will remain the same at heavy current demand as at light current demand, and thus he divides the RMS current demand by the conduction angle to come up with an absurdly high peak current figure. In reality, the conduction angle increases as the current demand rises, and thus the peak current rises to only about 50% to 100% above the RMS level. That still points to the need for good power conductors to minimize power loss, but they can be had for a fraction of what the boutique power cords sell for. Power cords that sell for $50, $100, $500 or whatever serve the ego and not the audio.