+1 Steve @williewonka
For making the point that even top level equipment benefits from good power and good power cables.
I will add that components that contain very good power supplies (like amps) will need extremely good power cables in order to hear a similar level of improvement, whereas, a component with a lessor quality power supply and only a reasonably good power cable may be attributed with a more discernable improvement.
For making the point that even top level equipment benefits from good power and good power cables.