Longer Power Cords Sound better?


In my quest for power cords, i have noticed that a longer cord say 6 or 8 feet tends to have a nicer sound in my system that the same models that are 3 or 4 feet.
Power cords i have found this to be true include Cerious Tech, Cardas, and VH Audio....anyone have an explanation?

AND by nicer sound I mean they tend to have a richer midrange, and a more coherent top to bottom presentation.
ie
Zaikesman, you should keep equal-length PC's on your amps. No matter which side of the length argument a person falls on, we're in agreement that length does affect sound. I would think that having unequal-length PC's would affect soundstaging.
I'll confess that I'm just itching to tell you what you can expect from your listening tests, but since that would 'poison' your mind, I'll refrain.
Stop concerning yourself with such nonsense and enjoy your system. No, there is no difference.
Here's some food for thought about longer lengths - It may just be true that a longer power cord could actually "sound better" BUT - this will vary from cord manufacturer to cord manufacturer. Why? Because many of the power cords are actually acting as a filtering device between the wall and the component, not just a power delivery device (or wire) that many of us suppose they must be. Recently I did a power cord shootout and discovered that quite a few of the respectable sounding power cords were also filtering as compared to some various DIY copper, silver, different sized guaged and cryod cords I had on hand (all of which were just designed to deliver raw power, period). With this in mind, it makes a perfect hypothosis that some cords will actually sound better (to a point mind you) if they are longer, since they may actually filter the noise to the component much better. Think about this guys, it actually makes sense!

BTW: None of my DIY cords could hold a candle sonically to some of the commercial cords that were obviously filtering in some way. (Have I perhaps uncovered one of "secrets" that differentiates the best cords from the also rans?)
Since this thread is back to my attention today I'll make good on my threat from above, and report that after additional testing with 1.5m vs. 2.5m lengths of a power cord specifically claimed by its manufacturer to incorporate beneficial filtering -- intrinsically via its lengthwise construction, rather than by some sort of discrete attatched filter (the van den Hul Mainsstream, which BTW is not offered in lengths below 1.5m for this very reason) -- I am reconfirmed as siding with the longer-is-better hypothesis (or at least more pronounced in its effects, which in this case I find salutory).