PJPro:Andrew Everard:
We'll be getting on to the Creation Fallacy soon, if this is following the strangely familiar path...
I suspect that the differences heard are as much to do with preventing the power cable "interfering" with the audio signal in the interconnects or speaker cables as much as anything else.
This could be a reasonable theory - either way, whether you're reducing interference from entering the signal path of the power supply or preventing it from interfering with the interconnects / speaker cables, this cant be a bad thing?
What I can tell you is that before I bought the ClearerAudio CopperLine cables for my system I had previously brought home a A$1,000 Smart Power Station for trial and although it regulated the mains supply effectively; it made little or no difference to the sound, hence it went back.
Following this, I bought 2 x CopperLine and hooked them up to my amp and CD player. There was an immediate improvement - I could resolve small details which I hadnt noticed before and the soundstage was marginally improved- not a massive effect you understand but an improvement nonetheless, hence I bought another for my BluRay player and a CopperLine Alpha for my Kuro display. All have made minor, incremental improvements - which is pretty much what you expect from these types of enhancements.
So, at significant $$$'s each, I may have ordered the first set but without an improvement I wouldn't have bothered buying more.
Whatever the reason for the improvement, they worked for me - v-happy ; )