Hello all and happy whatever you celebrate,
Thought I would add a couple thoughts. I basically agree with NatiKid. Though i probably would not hear any difference, i would not want to add more resistance to the crossover. Better speakers will have well designed xovers that may be changed enough to be audible, not only in frequency response, but electrical alignment and total power to the drivers.
Also consider you are not only adding fuse resistance but the total holder including springs, clips whatever. Better find gold plated holder 6 nines copper wound in golden ratios connecting wire with a teflon holder or more to match your vacuum packed battery biased cables.
The best case scenario is to drive your speakers with an amp of adequate power to drive your speakers as loud as you need without distortion. If unable to get the volume you need and these are matched, the cheapest way to add volume is to add more amps and more speakers (remember 10 times your original power only provides minimal acual loudness boost!). Of course this will destroy much of the original sound of your system (imaging, soundstaging, octave to octave balance, reflections, etc.)
Common sense will save more speakers than a fuse, also if you do fuse you want to use an instrument or superfast fuse, and this may not protect your speaker if the amp is very large or driven into clipping (per phase linear in answer to a letter many years ago (I think this was BC (Before Carver)
)
Just my thoughts, take with a grain of salt please.
PS Check out the new toys!