It's possible that SR fuse is affected by the turn-on sequence. My Pass XP-15 phono stage has no on/off switch. It's powered on once the AC cable is connected. I blew two Red fuses before I successfully used a Red with higher amperage rating.
By comparison, my PS Audio BHK amp is less likely to blow a fuse because it uses a lengthy turn-on sequence. I'll know for sure when my Black fuses arrive.
I also agree that some fuses are directional. I tried an Hi Fi gold fuse in my BHK Preamp. In a single blind test, my wife (who's a musician with better hearing) agreed that one direction was pretty good, while the other was quite harsh (almost unlistenable). This is a surprising because I never thought that it would be so obvious. We'll try the same test with the Black after the burn-in.
By comparison, my PS Audio BHK amp is less likely to blow a fuse because it uses a lengthy turn-on sequence. I'll know for sure when my Black fuses arrive.
I also agree that some fuses are directional. I tried an Hi Fi gold fuse in my BHK Preamp. In a single blind test, my wife (who's a musician with better hearing) agreed that one direction was pretty good, while the other was quite harsh (almost unlistenable). This is a surprising because I never thought that it would be so obvious. We'll try the same test with the Black after the burn-in.