Tvad,
Dpac996 probably can't hear it, because there is no difference and he is not falling for the placebo effect.
I agree wholeheartedly with Dpac996.
I can hear a difference from preamp to preamp, amp to amp, source to source, and somewhat, up to a point with certain interconnects, and a good power conditioner, depending on your power supply situation can make a noticable difference. But once there's a good connection from the power source to the piece of equipment, there is very little difference from power cord to power cord. There are more examples of snake oil with power cords than any other item in audio.
Maybe you are one of the blessed few with the "Golden Ears" or maybe you are just justifying a purchase. Whatever the case infering that someone else should have a crappier system because he does not have the dicerning taste that you do, is, well pompus and idiotic.