Fuses


I’ve read of views on whether amp fuses impart any sound quality or coloring. I had a recent experience that has made me re-think my views (fuses do not affect sound) and wondered if others had a similar experience. 
I have a Line Magnetic integrated amp. After heavy regular use for over 5 years, one day it just wouldn’t power up. After checking the power supply, I assumed it must be a blown fuse. I recalled that Line Magnetic sent with the amp two replacement fuses of the same type/quality that was pre-installed. I dug out one of them from storage, replaced the fuse and the amp powered up normally. 

What surprised and delighted me was the change in sound with the replacement fuse. Fuller bass, more detail and more warmth. I have rolled the tubes several times in the amp, and am attuned to the subtle changes that can make. Popping in a fresh fuse seems to have had a similar affect. And these appear to be cheap fuses, available for a few dollars at most. I don’t think I understand any of this. 
bmcbrad
femoore12-
I thought a fuse was a sacrificial safety device that melts during an overcurrent condition to protect an electrical circuit. So isn’t the role of a fuse to melt if there is too much current in order to protect an electrical circuit/device?

Correct. And you must have missed my earlier post explaining this. Ordinary fuses are designed to one spec, the current rating at which they melt and blow. They are not designed to perform perfectly linear or in any way at all really, at anything less than this. They are made to blow and nothing else.   

All wires, the more current the hotter they get. The hotter they get the more resistance increases. This is in effect a volume control, one where every dynamic peak increases current draw, which increases resistance, which turns down the volume. Ordinary fuses are in effect turning down the volume on transient peaks all the time. When you hear people saying the audiophile fuse sounds cleaner clearer more extended and dynamic this is all very easy to understand once you know about wires and resistance.   

Because unlike cheap fuses designed only to blow audiophile fuses are designed to perform with high sound quality all the way up to blowing.  

Pretty easy to understand, right?
Okay sorry, we were posting at the same time. You are right. The one who says many of us don't understand, he is in fact the one who doesn't understand. Anything, I am tempted to say. But won't.
@millercarbon
Thanks. I know I’m not the sharpest tool in the shed, but I am glad that reference wasn’t confusing just for me. 
Current draw only comes from the power supply caps. That is why they are located at that place in an electronic circuit. The heating/cooling cycle of a fuse has zero effect on the ability of the PS caps to deliver current. A fuse is not a volume control!