Originally Posted by Axle
Here is an objective explanation as to how a power cord can make a difference. Ferrite material used in power cables has high impedance at a specific frequency. The result is that the cable rejects that frequency only (noise) and passes others (60Hz). So if you have noise in your application at the frequency that is being filtered by a particular power cord then you may hear a difference, but only if your power supply is not already filtering it out.

OK, that is a good one. From my personal experience ferrite rings on power cords make no difference (yes, I bought a bunch just in case blush), or at least, they did not in my particular circumstances.

My Kit: 861v8+ID41, 800v4, UHD722, MD600, MS600, MS200, Oppo BDP-203, Genesis 201, Genesis 350 SE, Genesis S4-8 Sub, BG 520i, VTL MB450 II, Krell Showcase 7, Genesis 928 Subs, Danley DTS10 sub, SVS Ultra 16 subs.