What direction should Hi Fi tune fuse be installed

I use IsoClean fuses that have an arrow on the glass body of the fuse. I tried them both ways and decided that the sound was better with the arrow pointing in the direction of the current flow.

For mains fuses: With the power cabled unplugged from the IEC, use a test meter to check for continuity between the "hot" IEC prong and the fuse holder clips (with the fuse out) and then place the fuse with the arrow pointing toward the clip with no continuity in the fuse holder (AC flow direction).

For internal fuses, using a meter to check for continuity is more complex. It is usually best to try it both ways and decide which sounds better.

Good luck and Happy New Year!

The arrow indicates "current flow" as with IC cables.

I just looked inside to see which side has the wires to the transformer and which appear to have nothing. keith

Put all of the fuses in. Then start listening to the music. Swap direction of the first fuse and listen again. Choose the direction that sounds best. Now move onto the second fuse and do the same. Finish with the third fuse in the same way. You should then have the best sound at the end and the fuses orientated the right way (assuming you can pick fuse direction on your system). I find it quite noticeable with fuse direction. I have a combination of Hi-Fi Silver Star fuses and Furutech fuses.

For a long time Hi-Fi Tuning claimed there was no direction, but I always found there was, but it was predictable judging this from the printing on their fuses. With IsoCleans I have always found the arrow going with the hot side input is the best sounding, so I would confirm the current flow direction is the right direction for the arrow.

I should say also that when Synergistic Research tunnels fuses they do so in the direction of current flow. This greatly improves the sound as does painting the glass with AVM paint.