The only times I heard any improvement by changing a fuse was when I added higher-rated ones to speakers for protection. But the best sound was NO fuse (living dangerously!).
Aftermarket Fuses
Can I set the ground rules up front?? I hope so. There are two camps. One who can hear different audible reproduction using aftermarket fuses. The second camp can not justify in theory, or can not hear a difference in fuses. Fine. I respect both camps. Can we hold this discussion to those who can hear an audible difference in fuses?? Can we? If so, what is your choice in aftermarket fuses and describe, please, what you hear.