Fuses that matter.

Tbg, no offense intended but I suggest you try a second reading of the data.

;-)

Geoffkait, I must admit that my reading was most cursory. I was hoping that I could easily identify the best direction. No such luck, I guess.

This also leads to the need for science to follow up on this. Why does one direction sound better? How does Isoclean decide?

"This also leads to the need for science to follow up on this. "

If it was so important, would think it would have by now.

Mapman, not all circuit designers, even good ones, are aware that direction matters. E.g. caps, I would say most tube amp manufacturers do not place the metal film coupling caps correctly and a lot of cap brands do not mark where the outer oil is (that should be connected to the path closer to the electric ground) to have a better sonic quality. Similar to the fuse direction, when deployed correctly, the sound offer more clarity.

Often those with an investigative mind and/or have system and ears or setups like great headphones can discern the difference and in the very small niche of audio gear, it is not the first time that DIY and audio enthusiasts discovered what designers and manufacturers did not know.

The molecular structure of all metals is crystalline. The grain boundaries of the crystals, and oxides between, can act as mini diodes. That's why oxygen-free(7N) and Ohno Constant Crystal wire is so popular, in higher-end cabling. When drawn into wire; the crystals form themselves into a consistent chevron pattern(ie: <<<<<<<). That wire can be found directional when passing electricity, should not be a surprise(even in a fuse).