do fancy fuses help?

I started a thread on this question on the HIFICRITIC forum. Got some interesting answers, you might want to take a look.

For one of the more heated discussions on this topic you could check here. My opinion is damned.

Yes a fuse in the amp can be very helpful it saved a $3000 stereo Musical fidelity and some vintage stuff that couldc have caught fire and burned down the house the development town county and other parts of the state for want of a Nail. (In fond memory of rosanne rosannadana)

It can't hurt

The simple and inexpensive way to establish whether it's worth it or not is to, if your equipment uses stock glass fuses, replace all of those with ceramic fuses and if you have a cryo vendor locally, to cryo those ceramics. If you cryo, you'll have to go through a bit more burn in than non cryo (probably 2-3 weeks) but it's going to be a simple procedure to go back to the stock glass and compare.

I have not progressed beyond the above, which can be done very economically, and, IMO represents a decent sonic upgrade: even non cryoed ceramics represent a pretty big step forward from standard glass.

If you have 6-7 glass fuses to replace, they can be replaced in ceramic for well under $20 and I would suggest that you'll find significant improvement. If not, you're out $20.