Why don't amplifier Companies use high end fuses?

It has been pointed out by Atmasphere in a number of past threads that our hearing mechanisms use certain higher order odd harmonics as loudness cues. And also that our hearing mechanisms are extremely sensitive to even trace amounts of those harmonics. Therefore I suppose it is at least slightly conceivable that very small changes in distortion that might result in some unexplainable manner from changing the direction of fuses that are used in series with the DC voltages that power the active stages of an SACD player (as appears to have been the case in the situation Nonoise described) could be subjectively perceived as a change in loudness. Although even that possibility seems unlikely (to me, at least), especially in the case of a line-level component as opposed to a power amplifier.

However I will stake my reputation, such as it may be, on the absolute impossibility of a 2 or 3 db volume difference resulting from reversing the direction of any fuse in an audio component, assuming at least that the contacts are not severely corroded and that the fuse is not on the verge of failing. And assuming equal warmup states of the equipment.

As I have said and acknowledged in many past threads, science and engineering can neither predict nor explain a lot about what we hear or don’t hear from our systems. But it can certainly predict some things. If it couldn’t, the quality reproduction of music we all enjoy would not exist.

Regards,
-- Al

@almarg 
I see what you're getting at. Lest anyone else (other than Al, who knows) confuse the matter of in-room SPLs and volume setting, what I was referring to is volume settings. How that translates to in room SPLs, I can't say. What I can say is now there's too much pressure on my ears using the older volume setting. 

It's not an in-your-face aggressive experience (i.e. brightness, glare, etc.), just too much ear pressure. I even feel it more with my body, like sitting too close at a concert (oh, the foggy memories). The images seem too large as well.

Am I hearing too much? That would be silly for me to say but my comfort level is now at the lower setting. 

All the best,
Nonoise

One final question....I still don't have the fuse but I have to ask before I do get it.  I am not a true audiophile....I just enjoy great music.  I have around $60k invested in my two channel system so I think it already sounds great.  What is it that I will hear assuming that the Padis fuse works?  i.e. will the cymbals on the drums be more pronounced?  Will the bass be deeper?  Will the artists voice be more clear?  I just can't imagine given my system.  etc.

@willgolf,
How to sum it up....
Yes to what you just asked. That, and you can go back and read my other posts on it. From your question, I feel like all the air just went out of this thread.

All the best,
Nonoise

Okay, I just ordered one of the PADIS fuses from ebay.  I'm going to see how it compares to the out-of-the-box Futurech retail fuse.  When looking at the PADIS, I could not specifically tell if it was the exact same thing as the Furutech fuse.  There was a mention in one description that the PADIS has a silver element.  The standard Furutech has a copper alloy element.  Both have rhodium plated end-caps.  I could not find anything that said the PADIS has the special damping filler (anti-resonance) that the Furutech has.  The PADIS are so cheap, it's worth it just for an experiment.  It may be 2-3 weeks until I can provide documented results, depending on how fast it gets from Germany to the USA west coast.