“Is $2,844 too much to pay for a fuse?”
Not if the fuse is your spouse’s - self preservation often trumps the bank account 
“Is $2,844 too much to pay for a fuse?”
In a word...Yes.I imagine though that someone will think that if it costs that much it must be worth it, just not this guy.

I have relatively new Audio Research equipment.  Not long ago I contacted Audio Research for their opinion on the value of using more expensive "audiophile" fuses.  Their response was essentially if they made a difference, we would use them!  One cannot argue that AR doesn't want to use better fuses because it would increase the selling price of their equipment!  
You fuse, you lose!

I would definitely pay $2,844 for a fuse . . . If Jimmy Page or Robert Plant came to install it and play Stairway to Heaven or In My Time Of Dying to enhance the soundstage!
Can anyone provide technical guidance on how I can modify my amplifier?

I wish to add a $2 Littlefuse to the amp’s circuit that will blow first in order to prevent my $2,800 fuse from blowing in the event of an amp malfunction.