Is there a solid fuse-like item that I can use in place of a fuse, to bypass it?

Now I can see why companies are filling the fuse canisters with sand/epoxy/oil or whatever, its to keep the damn thing from dancing.

That dancing in the animated gif is actually an extreme version of electro-mechanical resonance.  This is another factor that affects sound quality.  The electro-mechanical resonance in the fuse creates a bright/harsh sound and can reduce bass.  The sand/power/oil filler is also to dampen this resonance and improve sound quality and current stability.

One reason all fuses sound different.

Electro mechanical fields are always in motion so they always generate resonance and vibration that attaches  interfering energy upon the originally  intended signal. Tom

The only reason fuse manufacturers fill their fuses with sand is for safety so that the glass does not shatter with a sudden temperature rise. It has nothing to do with their worry about reducing resonance or improving audio quality.

Yes thats why their fuses sound inferior..They don't know or care to know why their products sound bad because they couldnt conceive that there wire trapped in a tube would matter to the sound or performance of its host.

TomD

Ok, sand filled fuses may be to prevent glass shatter.  Those are more industrial type fuses.  However, audiophile fuses can use an oil type or powder type filler to reduce/damping electro-mechanical resonance.