In my experience, the Audiomagic fuses are not really directional. (well, they might be, but I have placed them forwards and backwards without hearing any significant differences). That being said, I have not done an A/B test where I reversed the direction for critical listening on Audiomagic fuse direction.
Fuses that I have tested and rejected: Hi-Fi Tuning Gold, Hi-Fi Tuning Silverstar, Hi-Fi Tuning Supreme, Isoclean, Synergistic SR20, Synergistic RED, Synergistic ORANGE, BUSS, Littelfuse (these are okay, but just okay).
Disclaimer: I have NOT tested the Quantum Science Audio fuses at all. These may work just as well for digital transport, but since I have no idea what kind of sonic character they impart, I can’t make a definite recommendation here.
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On the 9-12k post count, this is a generalization of what I see with most of these kinds of posts. Don’t take it as an absolute 100% match for every scenario.