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
Under transient loading and a traditional power supply or rectifiers, caps and transformers..the fuse is definitely in the signal path.

And it carries import due to the fact that the ear/brain derives 100% of what it hears, via 10% of the signal -----which is that of the transients. Just the transients. Just the leading positive edge, in their value, with respect to one another, and the timing between them, as a group.

The ear does not hear or use the other 90% of the signal. Which is why engineering weighting in signal analysis, where 100% of the signal is used..is mostly in error when it comes to correlating those engineering numbers to what people hear.

The ear is a balls on -off the rails- impossibly complex ~impossible to replicate with human hardware~...FFT analysis device. Far finer and more refined than anything we can build.

BTW, FFT analysis is based on quantum holography. No joke, no woo-woo, no hyperbola. That’s where the math and method of FFT comes from. It’s where FFT really shines.

The takeaway or next domino of logic (much research in this area for the intrepid explorer of science to find and peruse) Is that the brain function is Quantum zero point energy based - non-local holographic.

Ain’t that a peach.

Point is, that most people arguing science here, don’t even know what the heck the car/vehicle that they drive and live in ---is.

No woo-woo, this is good solid modern cutting edge science I speak about.

A bit of extra point/credits, is that we’ve even had scientists remove part of the brain from animals and the animal fails to function. Which is expected, yes? Then, as an extreme level finale... to try and get to the bottom of their results..which will become clear in a second (regarding their high strangeness)..then take the half of the brain that was removed, grind it into hamburger(!)... and stick it back in to it’s original spot..and the animal goes back to functioning normally. In that context, what exactly is a brain, then? (No one exactly knows yet, but it’s certainly beyond classical Newtonian meat and clockworks, as the intrepid seekers have found out.)

Ouch. Definitely one step too far for the fears of most humans. Not unlike that of this ridiculously simple question about fuses.

When we look at how the world ~really~ works, it can drive the intelligent to tears.... to see how uninformed and unaware people can be...and then...argue about such trite and obvious stuff as whether a person can hear a fuse or not.
@teo_audio,
Bravo!

By the way, how many patties can I get out of half my brain? 
Apparently, I don't need it anymore, and I loves me a good burger. 🤔
I thought I was asking a simple question but given my email account is  exploding, I think I opened up a can of worms.  
you wouldn't think a $25 item or one with return privileges would cause so much...at least all you have to do is try them and see if you like them...

Wow, this thread went to a black hole in a hurry!

Several things we need to be aware of:

- If you have looked inside a fuse (like the glass fuses), you will see a VERY thin wire. Say a 1 amp fuse. The internal wire is extremely small, something like 26awg or 28awg (not entirely sure). If this is for a preamp, would you ever put on a power cable smaller than 18awg? (that’s stock, and I don’t think they make them smaller). No, you would upgrade to something like 14awg or even 12awg -- so that there is less current restriction. All A/C has to go through this tiny wire, even if it’s less than 1" long.

- The wire in the fuse has electrical resonance as well. Different upgraded fuses will sometimes do things to combat this resonance. The same thing happens inside electrolytic capacitors (during charge/discharge). The material/filler used in capacitors has a definite affect on electrical resonance and sound quality. Poor resistance to electrical resonance in caps will result is harsh sound that lacks solidness.

- People who say that the fuse and power cords are not in the signal path are not entirely correct. The actual waveform signal that starts at the source is never the actual signal that makes it to the amp. For anyone who doesn’t realize this, the basic idea of a transistor or op amp circuit is to "regenerate" the incoming signal. It never truly "passes through". There is always a resistor that the signal passes through and then a opamp/transistor gain circuit. Well, the gain circuit uses voltage/current from the A/C power supply to re-create or "add to" the output voltage for the signal. The power cord and fuse has a definite impact to the quality of this power supply voltage/current.

- Since A/C power is used to create/add-to this signal, the type of power cord or fuse will definitely affect the "flavor" of the sound. Just like comparing gold-plated connector to rhodium plated. Comparing silver wire to copper wire, etc.

- There are things that our ears are hearing which we cannot measure for at our current level of technology. Granted, electrical engineers will "nay say" this, but ask yourself this: What can we measure today that we couldn’t measure 10 years ago? 20 years? 35 years? (when they were making tube based electronics).