Fuses on Magnepan .7 speackers

I have upgraded the fuses in my 1.6's and 3.7's. 
Yes, there was an improvement.
There are a variety of fuses and prices to select from. I eventually purchased the Verastarr "Experience Truth Audio Upgrade Kit" which uses a Fuse Bypass. If a fuse bypass doesn't bother you, contact Mike Powell at Verastarr and see if he can assist you. The fuse bypass (a silver plated tube the size of the fuse) was an inprovement over designer fuses.

A fuse is a fuse is a fuse ... THEY ARE ALL ALIKE! If a fuse works it is a GOOD fuse! Do not listen to what the crazies say! Whether a fuse costs $1 or $150 THEY ALL SOUND ALIKE! A fuse is NOT a tone control and does NOTHING to change tone quality! So save your money for something that really matters, like better amplification and better recordings! 

Never have so many been so deluded about a small piece of wire!

Some fuse makers(ie: Synergistic) offer a free trial period, so- you’ve nothing to lose, by ACTUALLY TRYING their products(unlike MOST neigh-sayers). Listening to them, in your own system and with your own ears, is the only way to know if you can hear an improvement, worth the investment. I use Hi-Fi Tuning Supremes, in everything but my Maggies(in which I’ve always bypassed the links and fuse holders). In every application, upgraded fuses have made an audible uptick in performance. You can see an example of a return policy, here: http://www.synergisticresearch.com/fuses/blue/ If the neigh-sayers had their way, NO ONE would be trying ANYTHING that doesn’t fit THEIR way of seeing things. They’re quick to voice their(generally) untested opinions though: https://www.youtube.com/watch?v=NdCxHJIYz8I