Power cord length?


If I'm going to spring for an uber expensive cord-a 'final' purchase-say an MIT Oracle AC 2--is there any sonic benefit going to a 4 meter vs a std 2 meter? (I have absolutely no chance to audition). Technical details of 12 ft versus 6 ft power cord?
ptss
I suspect the only thing one could bank on and worth the worry is make it long enough to reach the outlet.
@ Mapman, Hi, As I said, I contacted Tara labs, their answer, does not make a difference in lenghth between 3ft that I have, 5ft,6ft, man, I was concerned there, as it turns out however, I do want to do test myself regarding this matter, maybe you could to, and tell me your findings.
Hi Mapman, I hope you are correct, one would also need to consider the make and model of the power cord in question, I have a 3ft Tara labs cobalt power cord, you can understand the reason for my post above, have you ever noticed a change in the sound with different lengths?, I may ask Tara labs concerning this, Happy listening.
I thought that the longer cables have more surface area to disperse/filter noise.
Leicachamp, you talking on the technical side of this; which was brought forward mu query.