How does length affect power cable sound quality?

Unless you are talking about an extremely long run of power cable, or a cable with really bad quality wiring and/or construction, there should be no audible difference between a 3 foot and a 6 foot length.

Consider that the power coming from your wall socket has just completed a trip of hundreds, maybe even 1000 miles or more, and gone through how many switches, transformers, etc., and the distance from your outlet to your audio system pales in comparison.

I have tried various lengths of power cords and so far it appears that six feet to ten feet sounds best. A reviewer and an audio shop owner have told me that the better power cords are designed to dampen/filter "mechanical" resonances, amongst other things. And that if the cord is too short (less than six feet) it is physically unable to accomplish this purpose. One designer used an analogy of comparing a power cord to an attachment you put at the end of a garden hose in that both change the character (focus/filter, etc.) of the what comes out at the end.

Therefore, it does not matter how many 1000s of miles the electricity goes through before it gets to your outlet- it is the last six to ten feet that really counts.

OK- here's what I understand so far: A power cord designed for the purpose of altering the perceived sound quality is usually best at a length of 6-10 feet.
So do quality power cords work in conjuction with power filters? I'm currently running Monster Power HTS-2000 for my Stereo rig, and a Monster Power HTS-5000 with a Monster Power HTS-1000 plugged into it for my Home Theater. I also have 8 AudioPrism Quiet-line Filters stategicly placed.

I guess the answer in in the hearing. It seems to me that power filters should clean things up so that further filtering with a 10-foot power cord would be redundant. But my ears say this isn't so.

Maybe what I'm asking hear is WHY does a quality 6-10 foot cord make a unit sound better. I'd like an answer with all the physics involved fully explained. The point is that if it were possible to mathematicly describe why one piece of equipment sounded better than another, it would be easy to just design it. But it's not, because there is too much magic involved. (Magic, or voodoo, is just another term for science that no one understands.)

There's a couple of people you can call for an answer and I'm sure they'll help you:

1) George Tice (www.ticeaudio.com)
2) Bill Parish (www.gttgroup.com)

Tice's line conditioners include a fixed TPT treated power cord--which *does* enhance the musical signal. Bill Parish markets the Absolute Power Cord, which was designed to be tuned exactly at a length of 8 feet.

I think this is what's happening with Tice's treatment:

Electricity exhibits the behavior of both wave and particles. So what's in the conductor as impurities will cause particle collisions and the way the lattice is arranged will also influence the wave/particles. TPT treatment rearranges the lattice--it's a materials treatment, like cryogenics. One works by tempering, the other uses voltage/magnetic field manipulation. And Tice uses *the* best copper available--he's a fanatic!!! What's going on, in my layman's opinion, is that TPT in conjunction w/ Tice's top quality copper sends a very unique waveform to the electronics. And that waveform is indeed the raw material from which music is made...

I had some 3 foot and 6 foot Vansevers cords of the same make. The 6 foot cords were a little warmer to my ears. I also found at least 6 foot was best for my REL sub. I have some other brand cords, but only in 6Ft or more, so can only speak about the VE cords.