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.

I recently replaced my VAC Monobloc fuses with the Hifi Tuning fuses( 4 amp slow-blow) and the improvement was noticeable and for the positive. Not dramatic, but "icing on the cake" good. I won't be going back to the cheap glass versions. Worth it? Yes, IMHO.

Tbg - I wasn't aware of Isoclean as an "audiophile" fuse option prior to your post. Thanks for that. I did a little internet searching and came across a review of them by Albert Porter. Whether he or another, the reviewer did prefer them over the HiFi Tuning Fuse. The Isocleans are ~$5.00 less than the HFTF but if I read correctly, the Isocleans are only available as "slow blow". Let me know if that's your understanding too. Since I'm only using 1 and since my amp calls for a fast blow fuse, I'm sort of reluctant to take the gamble on the Isoclean.

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.

Thanks for the input Tbg. You are right. I'm using a "small" HFTF. Pricing for the larger HFTF is more.