Hifi Tuning Fuses

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.

I installed a pair of HiFi 1.5 amp Silverstar fuses in the fuse holders of my 35 year old Thiel Speakers. These fuses are directly in the signal path. Years ago I blew a speaker fuse and went to Radio Shack to find a replacement. The salesman came back with a couple of fuses that I later installed. Soon after that I blew the tweeters in both speakers, one after another. I can't tell the fuse rating by looking at the fuse. The writing etched on the fuses is just too fine. I found information about HiFi Tuning fuses online and decided to give them a try. I immediately noticed a subtle improvement in soundstage depth, bass slam, and overall clarity. The improvement is getting better with more playing time as the fuses burn-in.

I used a hifi tuning fuse on my headphone amp, and the difference is not huge. But one can notice the improvements over the stock one.