How can power cords make a difference?

Changing a power cord could make a difference. It simply means that either

1) the audio equipment is too sensitive to the input power supplied

or

2) the electrical supply is falling outside the acceptable range for the audio equipment.

Good audio engineering design requires that equipment be designed to work properly and robustly under a range of power conditions. This is necessary because not everyone's home wiring is the same, nor is each home at the same position on the same electrical grid. Also the quality of electric power will vary with demand particularly at peak load times of the day (for example at mornings when everybody puts the kettle/coffee maker on, or on a very hot day due to air conditioning).

The solution to this problem is not to try different power cords but to find out which of the above 1) or 2) is the root cause of the problem and try to fix that. If necessary change house wiring, get a power conditioner or change the overly sensitive audio component.

Jafox,

I read your interesting thread on Power Conditioner to the Rescue and how you had very little prior sucess with power cords. This is probably because the Eclipse gave you a proper stable electrical supply and allowed your components to perform optimally.

IMHO, a Power Conditioner is much more likley to make a big difference than a power cord.

This question is for those of you that have experienced huge improvements with changing a power cord (and not the objectivists or unbelievers who refuse to hear any difference);

Aren't you the least bit concerned that your audio setup might be overly sensitive to small changes in power?

Is there any correlation as to where power cords make the biggest difference, for example is this predominantly a tube thing?