How come a power cable changes the sound?


A good power cable definetely changes the sound but how ? A cheap 2,5 mm copper cable comes upto wall outlet and comes through a fuse (which has very thin wire) than we add a huge heavy power cord which cost 500$ than the sound of the equipment has big improvement What is the technicial logic and magic out of that ? Thanks..
oatalay
Back in the 80's I remember salesmen trying to convince audiophiles that the first generation CD players were the "ultimate" and totally superior to vinyl.  But to realise the benefits that "superior" CD offered - it required another investment.  A special very high cost isolation stand was required to remove the obvious harsh digital distortion that was caused by vibration.

This was of course all sales bunkum - but it extracted a lot of money from the gullible who did not realise the real issue was the CD player design and limitations of the medium.

From my perspective there is a hierarchy in audio systems - based on proven engineering principles:  The system foundations are the amps, loudspeakers and of course the quality of cd/anologue sources.  Room acoustics and personal hearing are also important factors.
Second comes the interconnects/speaker cables that we all agree can make or break the system.  

At the third level,  I believe good mains filtering produces audible improvements in a high-end system and I use one!
However, I personally have not detected any audible improvements in changing from good stock (Isotek) mains cables to very high cost esoteric alternatives. 

Instead of spending big money on mains cables I suggest a  "signal path component upgrade"  may be more rewarding.







Ebm-a very appropriate question.
Millions on earth will never ask that question and millions more will never know why--but as earthlings-we will enjoy it's blueness regardless the reasons. I found going to an MIT Oracle AC3-a straightforward non networked power cord-- a big improvement to the standard power cord shipped with my reference Spectral gear. To know why would be nice--but I won't put off the pleasure until I know why. Cheers. Happy holidays. Pete
Rayleigh scattering causes the sky to appear blue

power cables should not affect your sound
- if you think they do, try some blind testing
- if they really do, a real moron designed your amp
Well back in 2000 when this thread started things were a lot different.

Just for starters trolls didn't have to look back 16 years to find to find something to re-troll.

Have a Merry Christmas everyone.