I agree that short of a big power amp being severely choked with a puny cord, digital gear and / or highly advanced preamps seem to be the most sensitive to changes in AC power delivery.
I changed power cords on my Philips SACD 1000 and noticed what i thought was a huge difference. After changing the cords, my Brother looked at me with a smile on his face and said "you know we're not hearing that. It's all psycho-acoustics, right?". Swapping back and forth between the two power cords and charting the system's frequency response using test tones verified that there were not only audible differences, but measurable differences.
The weirdest thing about this is that the only real difference between the two cables is how the ground is implimented. Other than that, the two cables use the same identical geometry and materials. Due to the differences in ground wire configuration, this results in an impedance change along the entire length of the cable. Given the fact that the SACD 1000 has NO ground at the IEC jack from the factory, it is not electrically connected to ground. Just altering the impedance of the AC cord was enough to alter the frequency response of the player. This tells me that this player is WAY under-designed in the power supply. But then again, what digital gear isn't ? Sean
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I changed power cords on my Philips SACD 1000 and noticed what i thought was a huge difference. After changing the cords, my Brother looked at me with a smile on his face and said "you know we're not hearing that. It's all psycho-acoustics, right?". Swapping back and forth between the two power cords and charting the system's frequency response using test tones verified that there were not only audible differences, but measurable differences.
The weirdest thing about this is that the only real difference between the two cables is how the ground is implimented. Other than that, the two cables use the same identical geometry and materials. Due to the differences in ground wire configuration, this results in an impedance change along the entire length of the cable. Given the fact that the SACD 1000 has NO ground at the IEC jack from the factory, it is not electrically connected to ground. Just altering the impedance of the AC cord was enough to alter the frequency response of the player. This tells me that this player is WAY under-designed in the power supply. But then again, what digital gear isn't ? Sean
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