Which SR Blue or black Fuse

The only fuses I've used in recent years that blew were SR Black fuses I was testing for their sound. Also, I concluded that they had no impact on the sound of the components I stuck 'em in, and after testing I sent the pile of them back to my source. I'm sticking to Littelfuse and other stock fuses that work fine and, like any other well sorted fuse, have zero impact on the sound except when they melt.

@nonoise 

Sorry if you've spent your life listening to mass production amps with torpid little power supplies. My amp is 31 watts per channel with a power supply rated for 400 watts per rail. Not sure what you're listening to, but I've never heard of a class AB amp that over-built. That's a 31 watt amp that won't show a clipped waveform until you reach up around 120 watts into 8 ohm. And there are guys that drop 2 of those into their amps. You'd be a complete fool not to fuse something like that conservatively. 

I’ve been in the fancy fuse game ever since Isoclean, yes they’re UL rated, came on the scene nearly 20 years ago. So, I was one of the first. But I never had a fuse blow. I’ve also had Audio Magic Nano fuse. Never blew. Boy, was I lucky!