As various knowledgeable folks here have suggested when the topic comes up over the years, it’s a no-brainer for anyone to first try to just reseat the existing fuse or if need be replaced first try a new good quality standard issue fuse like Littlefuse or others that will not set you back much to try before dropping big bucks on anything else. Then if you hear a difference you can more reliably associate it with the reason.
I’ve reseated or replaced many fuses for myself or others....that alone can make the difference.
Which is exactly why the first thing I did when I got my first Blue Fuse was to pull the factory fuse, clean the fuse and holder, and replace it. No difference. Why would there be? Only if it was dirty. Which it was not.
Then the Blue Fuse went in. Obvious huge difference. Also- read my review- also obviously wrong. Within minutes it was clear the Fuse was in the wrong way. It sounded better but not right. Flipped around, wow, much better!
Its simply no contest. Not only easy to hear the difference the Fuse makes, easy to hear the difference the direction of the fuse makes. People posting derisive comments should stop being disingenuous and openly declare they have never tried these things and therefore have no idea what they're talking about. Now that would be fun to see.
I know. Dream on.