Why don't amplifier Companies use high end fuses?


My equipment - Raven Integrated Reflection MK2 tube amp 58wpc. / Lumin A-1 DAC Streamer / Synology NAS / Isotex Aquarius Power Conditioner / Furutech Rhodium Plug / Sonus Faber Amati Homage Tradition speakers.  

I have read thousands of comments on upgraded fuses improving the performance of sound.  I am very open minded but not sold either way.  So, the question I have is....if fuses were so important, than why don't Amplifier companies all install them as OEM equipment?  To me, if they are as good as people say, that would provide companies who use them a competitive advantage?  

Every High End Audio store I go to in Phoenix have told me it does not make a difference and is a waste of money.  For the record, I have fuses purchased at an automotive store for under $10 and I think my sound is awesome.  The Company that built my amp tested the Synergistic Fuses and he emphatically said there was no difference.  

If I were to try a fuse for fun, given my equipment, what would your recommendation be to try?  
willgolf
@kosst, when you built your diy amplifier, did you try different " isolation feet ", such as brass or metal cones, or the rubber type, because, there is a huge difference in the sound of an amp heard through the speakers. I am not sure these differences are measurable, but certainly audible. One would have to try it though. Steve McCormack, when he started the Mod Squad, shared with listeners, that there was an audible difference in these isolation things. It was up to " us " listeners to hear it for ourselves. Now, there are so many of these devices, of all designs and materials, at all price levels. Many specific to equipment, speakers and so on. I do not claim these can be scientifically be measured, but I do claim they are audible. Again, one would have to try them. This is my biggest beef with you, that you are so closed minded as not to try, and listen. With so many money back guarantees offered, you have very little to lose, other than some time. You do not rely on your ears. Again, I feel you are at a loss. I will continue pursuing these tweaks ( snake oil to you ), because, I enjoy the experimentation, and make up my own mind, by listening. I do not care if it is measurable through equipment, as, I am not an engineer, but I was a musician ( vocalist actually ), and have trained my ears to many things. I want to point out, one does not need to be a musician to hear much of this. Two pre amps ( amps, cd players, d/a converters, etc.) can measure quite closely, but sound quite different. This is the world of high end audio.
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Measurable changes? Huh? Spare me! Nobody measures audio feet. Especially not you. But just for grins, how would you measure the difference between carbon fiber feet and ceramic feet? And between ordinary steel springs and cryogenically treated steel springs? The difference between cones points down and cones points up?
@geoffkait . kosst does not understand how the ear is a measurement device in and of itself. My thoughts are that kosst is listening to his system, and not the music. I know some people, like him, but most I know ( not all ), have been open to listen. But even those folks who do not bother with " my little experiments ", ever doubt what I hear, as many of them have heard my system, and, that says enough.
kosst_amojan683 posts12-14-2017 11:15pm
" I don't know why I keep doing it. It's like some weird compulsion. Maybe my life doesn't have enough fantasy and fiction. I should probably go back to reading Dune. Honestly, I'm really curious why people believe in things that don't exist. "


Very sad I hope you get the help you need for this.