Originally Posted by Prog Rock Man
My understanding is that you should look at it the other way round. So you go from the hifi back to the power station. So, it does not matter what is going on on the mains and all that is needed is to condition the mains/remove RFI/EMI just as it goes into the hifi.
It is a bit like a harbour wall. So what if there is a storm at sea, so long as the harbour is protected.
Now, I'm sure it's been posted elsewhere, but could you more thoroughly explain this "other way around" thing? It doesn't make sense to me when it's just stated like that. Damage has already been done by the house wiring, the power lines, the generator, what have you. So in my mind the power cable is a very small portion of the wiring.
Let's just say for simplicity that the wire to the generator does nothing. And let's also assume that so many feet of regular ol' wire degrades the quality of power by so much percent, say 1% for every ten feet. If your house is wired with 50ft of regular wire, and you have a $500 10ft power cable, then by the time the power gets to the cable it's at 95% of its quality. Unless the cable fixes that 5%, it's really only preventing more
degradation. Degradation that's relatively small in comparison. And if a cable is meant to fix the signal, wouldn't a dedicated conditioner do better than that?
This is all assuming that a 5% decrease in power quality even matters much to the sound after it goes through a conversion to DC.