Power Conditioners: Myth, Magic, or Necessary

I do know from experience that, as others above have attested, different components will benefit to differing degrees from AC power tweaks. Your amps simply may not need this treatment to sound good. Or, your system (or ears) could be failing to inform you of the differences, which can range from large down to subtle in nature. And then there are always the matters (as was also mentioned above) of *which* PC you're using, and how contaminated your AC is in the first place.

So I'll just bring up two things additional here. One being that, other than your AC quality straight out of the wall, there's also the issue of stray environmental RFI/EMI to be protected against, and the possibility exists that in your particular location and system, this may simply not be a big problem. The other thing is that in many instances, it can be source components that will reveal the most benefits from an upgrade PC, so before you sell the cords, you may want to try them out there instead just for grins.

I have found that filtered power, and especially balanced filtered power, can and does make a positive (though not life-changing) difference, particularly on my digital front-end, so you may still want to try a PLC out. But after all is said and done, I agree with Tim and the others - if you can't hear an improvement, then be all means get rid of 'em and just enjoy your music!