I know it's difficult to accept for some people that power cables can't possibly have the impact on components that some people think they hear, but there's every indication that power cables, of sufficient gauge so as not to cause a voltage drop, are completely without an audible signature.
For any audio component, as soon as the electrical current reaches the power transformer it will be changed, altering the voltage level. (Mostly, up for tubes, down for transistors.) Then the 60hz AC is rectified to direct current (~0hz), and passed through one or more large capacitors, which have their own effects on the current. (One capacitor effect is that they act as little short-term batteries, so even if the rise-time of power cables varied a lot like that web page pointed to above implies - and they don't - the power filter capacitors would make up the difference on most amps.) At this point the current drives the output stage of some amplifier function, with gain factors that vary from 0db (for a line stage pre-amp) to ~30db (for a very powerful amplifier).
So what you folks that believe in audible differences are trying to tell us, is that specific audio consequences, such as frequency response differences or sound stage artifacts, can be designed into power cables, that have the current they carry so vastly changed before it affects the speakers in any way, and the only tools the cable manufacturers can use are variations in conductor material, strategies for winding the conductors, and the insulation material. To me, that is akin to saying you can build a computer from some baling wire, duct tape, and paper clips.
It just fails the believability test.
For any audio component, as soon as the electrical current reaches the power transformer it will be changed, altering the voltage level. (Mostly, up for tubes, down for transistors.) Then the 60hz AC is rectified to direct current (~0hz), and passed through one or more large capacitors, which have their own effects on the current. (One capacitor effect is that they act as little short-term batteries, so even if the rise-time of power cables varied a lot like that web page pointed to above implies - and they don't - the power filter capacitors would make up the difference on most amps.) At this point the current drives the output stage of some amplifier function, with gain factors that vary from 0db (for a line stage pre-amp) to ~30db (for a very powerful amplifier).
So what you folks that believe in audible differences are trying to tell us, is that specific audio consequences, such as frequency response differences or sound stage artifacts, can be designed into power cables, that have the current they carry so vastly changed before it affects the speakers in any way, and the only tools the cable manufacturers can use are variations in conductor material, strategies for winding the conductors, and the insulation material. To me, that is akin to saying you can build a computer from some baling wire, duct tape, and paper clips.
It just fails the believability test.