Ok, this time I'm serious...
In addition to the Pass amp I used for my fuse experiment, I have a Parasound Halo amp that I use for home theater. Yesterday I opened the Parasound and removed all the fuses, 6 in total. First I cleaned the endcaps with Cardas contact cleaner and then I polished them with Progold. I reinstalled the suckers and fired things up. I thought I noticed a slight improvement, though I may have been imagining it.
Then I decided to clean and apply Progold to every contact in the system, including the contacts on the power cords and IEC inlets. Now THAT was audible.
Bryon