Playback Design with Hifi tuning fuse

I'd buy half a dozen of the 40$ fueses and play with 'em until I figured it out.

Nonoise.
Was that the article on circuit breakers?

For the straight skinny on fuse specs, the littlefuse site has a lot of information with little digging.
Yeah, memory MAY be an issue, but certainly not on a new fuse of the correct value and rating. Some may be putting 32v fuses where 250v is required? Instablow in that situation requires some investigation.

I'd be curious to know what the UL test / qualification procedure are for fuses....
OR any other governing body, for that matter.

In a not-quite related phenom. Aluminum has no fatigue limit, so every mechanical stress cycle eats into ultimate lifetime.

Steel and its alloys have a fatigue limit which if not exceeded promises an essentially limitless liftime. Exceeding the fatigue limit begins stressing the structure and once you go over the tensile limit, you're all in.

Perhaps something similar with fuses, only electrical where the heat of passing current effect ultimate lifespan.

one MAJOR key is process control during manufacture
Measurement instruments....like for metal thickness, are checked on a regular basis, calibrated regularly and have a gauge R+R study done annually.

ISO standards require the above, so buying from an ISO certified builder is IMO, a Key Requirement.

Once you have a database, turn the math guys loose on it, you can build successful models of most anything. We used modeling extensively in semiconductor manufacture.

I expect fuses to have very regular materials....the right alloy, internal process control and a well-trained workforce working to the build specification.

Go to the littlefuse site and read around for further info. I saw a white-paper there about fuse ratings /

As for a test: It of course makes a huge difference. The test cycle could be anything from stuff like.....10 seconds on @80% fuse rating / 10 seconds off for 1 hour, followed by 'test to destruction'.
The other test cycles I'll leave up to your imagination. I just made that one up.