08-23-07: Bar81
Isn't the fact that a power cable is making a "huge difference" indicative of issues in the rest of the system it's being used in, particularly where it's changing the sound of such system (as opposed to lowering the noise floor, etc.)?
Bar81 (System | Answers)
Bar81 is making a good point. I would like to add to what was said above, that in my experience, the component on which a power cord change has such an impact, usually has a power supply design that leaves a lot to be desired.
A component that has a properly designed, implemented and functioning power supply, simply by swapping a power cord should not change in a way that was described above by Brutusab.
That said, I would also like to know what make/model that component was.