So we have 4 so far: Blake, Detlof, Redkiwi & myself who can attest to the positive attributes of appropriate fusing, yet the Doubting Thomases persist in disseminating misinformation & telling us what we can/cannot hear. Worldcup did not request opinions from those who don't even have a clue; he wants to know "what happens when" & those of us who have that experience have responded to help him. But we've heard this all before: all amps, all cables, all CD's, all (insert ___) sound the same. My take on this: all Doubting Thomases sound the same!
For those who do know but want to understand why, I cannot help you because I don't understand it myself; it makes little sense to me either. But I do know what I hear.
I'll conclude with a story about a blind test that I performed unknowingly & accidentally, if I even needed any proof this then is all that's required. Power went off at home for several hours one day when a storm was passing through, so I turned off all audio system power switches of course. I even went downstairs to pull the (then glass) fuse & decided to try "that ceramic fuse trick" that I had read about from Redkiwi. I installed that ceramic fuse & then promptly forgot all about it. I didn't power up the rig until the next day; turned everything on & was playing the tuner so I went outside to do yardwork for awhile. A few hours later I came back inside for a break & was sitting on the sofa wondering why the tuner sounded better than it had previously? The sound was richer & warmer, just more pleasant to listen to, but I didn't know why? I dismissed it to audio psychosis & returned to my tasks. But I kept hearing that nicer sound so that night I played some records & CD's, all sounding better than before. I didn't say anything to my wife about it, but the next day she was there quizzing me what had I done to the system & why did it sound better? I didn't know why, but we both agreed that something had changed & we liked it. It wasn't until several days later that I remembered the fuse change & attributed the improvements to that! Just to be sure I restored the glass fuse, but not for very long because that was the answer.