What are fuses used for?


I have, I’m sure to many, a very dumb question. I keep reading about fuses.  I have a fairly sophisticated system and have never come across the need for a fuse.
Can someone tell me where these fuses go and what they’re used for?
rvpiano
No, it's not BS. It's being able to hear and appreciate the difference. 👍
By the way, who's been busy getting posts deleted? Someone with their fee-fees hurt?

All the best,
Nonoise
The naysayers must be studying the script of 12 Angry Men. “You can’t prove it!” “But you said we can forget about all the other stuff.” “How can be be so sure?! “I’m telling you, some of you people in here must be out of your minds.” “Don't give me that. I'm sick and tired of facts! You can twist 'em anyway you like, you know what I mean?”
Nope, it's not BS. I think its more system dependent than anything. What I'm finding through conversations with other members is that some tweaks, like those wall socket plug-in thingies (I forgot the name of them again), counteract other tweaks. Either that or its a hearing problem of some sort. Or maybe we're just listening for different things? 

On proving it through measurements, I've personally measured each upgrade through one of the most accurate measurement devises known to man ... the human ear. Not as good by far as the ears on dogs, but good enough to be used throughout the ages for a variety of things, including the preservation of the species. 

Frank
Speaking of preservation of the species, how on earth did we ever survive this long without double blind A/B testing? Can someone bring in that saber tooth tiger again just to make sure that was what I heard and not some water buffalo. 

All the best,
Nonoise