Whatever your brain convinces the ears ! ?
I've experienced listening to a fuse shootout on a guitar amp using a glass fuse , a Littlefuse ( or Bussmann ) , a cryro'd ceramic and a gold plated ceramic . Yes I heard differences ( small but discernable ) the end result the My brain convinced My ears that the Littlefuse sounded best , does that make the other fuses inferior ? No I liked the sound of the plain ceramic fuse .
Now , my amp has 7 fuses 1 main and 6 on the board so I went to our local electronics supply and was able to purchase the 3 different values of generic ceramic fuses replacing the glass ones . A few months later no sound out of one channel so lifting the 56 lb. amp on to the bench and testing the fuses I found one of the four 6 am fuses blown . This pissed me off ( my own fault for using generic fuses , so I ordered Bussmann fuses and Wow just changing from the generic fuses made a sonic difference/ improvement . $2.00 each verse 50 cents , OK so how o\would a HiFi Tuning , a Synergistic Research or some other Audiophile fuse sound ? I considered the HiFi Tuning because they were the least expensive but when a Furutech showed up at 1/2 price $35.00 I had to try it on the mains input only . Does it sound better ? Well My brain convinced my ears that is does BUT when doing a back and forth with the Bussmann and the Furtech my wallet said yes the Furutech sounded a little bit better but not nearly enough to even consider replacing the other 6 fuses on the amp . I have replaced all glass fuses in my system with Bussmann or Littlefuse ceramic ones . But if I win the Lottery then maybe ?