Fuse directionality is not something exclusive to only high-end fuses. I found that even cheaper fuses have a preferred direction. One way to find out is to look at the cap ends with a magnifying glass. I found that the majority will have the power rating stamped on one end, and the other will usually have an assortment of symbols. Yes, I found the OEM fuses even sound better in one direction, but not the same as the high-end ones. I have the Hi-Fi Supreme fuses. Before plunging, I tried ceramic fuses of the same rating as the OEM. They sounded a bit smoother than the OEM. I simply diagrammed on a paper the direction using the cap's indicators. So far, its been consistent for each fuse. They key is, one direction will sound smoother in comparison.
Determining current flow to install "audiophile" fuses.
There are 4 fuses in my Odyssey Stratos amp. I recently returned some AMR fuses because they rolled off the highs and lows a little too much for me. Mids were excellent though. Anyway, I'm getting ready to try the Hi-Fi Tuning Classic Gold fuses, as they are on clearance now for $10/ea. Are they any good? However, I have read that they are a directional fuse? Can anyone confirm this? If that is the case, does anyone know the current flow for the Odyssey Stratos? Or, does anyone know how figure out current flow by opening up the top and looking at the circuitry?