having lots of audiophile fuses in my fuse board an audiophile FI general fuse (in the middle, right) is still missing. I am using a standard one. Being not allowed to use other fuses due to legal rules I need to go for another FI fuse, in audiophile format.

in two days I have a meeting with my electrician changing the fuses. If it is a listening difference in sound I might go for it.