Why don't amplifier Companies use high end fuses?

Full disclosure: my previous system’s World’s Most Modded Oppo 103 employed a copper bypass in lieu of fuse. The Modded Woo Audio Headphone amp with ’42 Tung Sol rectifier tube and two '52 Sylvania Bad Boys (2 Herbies tube dampers each!) employed the Audio Magic Nano fuse, the correct direction determined by listening, no biggie.

These days I eschew fuses altogether. I do not use house AC power and there’s no place for a fuse even if I wanted to use one. No more power cords, no speaker cables and no interconnects and no digital cable. No more big capacitors, no more big honking transformers. No room acoustics issues to suffer. No more teacher’s dirty looks. If thy eye offend three pluck it out! 👁

Directional fuses - brought to you by the same kind of people who sell you cheapo alarm clocks and pebbles in a jar as audio tweaks.  A scam plain and simple.

Curious how many have tried the upgrade fuses and preferred the regular ones...I've never tried the fuses...

It’s possible someone somewhere prefers the stock off the shelf fuse to some aftermarket fuse, though unlikely. It could happen if the aftermarket fuse was a relatively ineffective one. Not all aftermarket fuses are created equal. I could also happen if the stock fuse was accidentally in the correct direction and the aftermarket fuse was inserted in the wrong direction. Even that is rather unlikely. I suspect it’s possible the reverse expectation bias could explain why some audiophiles get bad results. You know, they psych themselves out. 😳 I mean, how would they be able to explain it to the other naysayers? Hel-loo!

There could possibly be a tie if the system used for the test was sub-standard or had errors in it, e.g, out of phase or out of absolute polarity) such that the differences were not audible. Yeah, I know what you’re thinking - but my system is fabulous! Yeah, right. Finally, the hearing of the tester might not be all that he thinks it is. A lot of folks can’t hear anything above 8 kHz, for example, or are not able to pick up on subtle differences. Almost everyone who reported on the various fuse threads over the years has good results. A few reported they couldn’t hear it. C’est la vie as they say in Miami.