Hifi Tuning Fuses

I have done several comparisons between the IsoClean fuses which I have been using for several years and the newer Hi-Fi Tuning fuses. I discovered that the Hi-Fi Tuning fuses are directional although they are not marked as the IsoClean are. You must try the Hi-Fi Tuning both ways. I have also discovered that the IsoClean fuses sound somewhat better and, of course, are cheaper. There is no question for me that fuses are very important and directional.

Ghosthouse, you are right that IsoClean are all slow blow, but there is nothing but the filament visible inside the fuse. It is my understanding that slow blows just a material around the filament to absorb the short term heat. I would call Brian Ackerman at aaudioimports and ask. I have never had one of these fuse to blow and really don't recall whether my equipment calls for one or the other type of fuses.

IsoCleans are $5 cheaper for the low value fuses, but much cheaper for higher values.