fuses - the $39 ones or the 85 cent ones

An interesting experiment for those with ordinary fuses in equipment/speakers is to reverse direction of the fuses one at a time, listening after each fuse reversal. You should be able to hear the sound improve or degrade each time a fuse is reversed. Your ability to detect this sometimes subtle change will improve as you go along. You can repeat this procedure a second time to be sure all fuses are finally in correct direction.

~ Cheerio

here's an interesting read about the german fuses.
http://www.soundstageav.com/onhifi/20060801.htm

My experience with these fancy fuses is as follows. They made very noticeable improvement on the power amp, but not much (if any at all) on the preamp and CD player.

Mboldda1
Thats actually a very accurate and possible scenario, and I agree with your link.. Fact is they make a difference was the point most don't even get!! Forget about proving if they are better or not, I will not dispute the fact they can have a negative effect on some systems, and it seems mostly systems with a bit too much "hifi" sound and very over steril systems will not benefit from new fuses like they would from adding tubes to the mix, unfortunately most try to do this exact thing and expect getting that "Cardas" cable effect or "Tube" effect doing little tweaks like this for musicallity.

Bottom line they will work one way or the other, however not always perfectly positive in all cases.

I will say this, the Hifi tuning fuses had a worse effect on my amps than the isoclean had a positive effect on my preamp at first, same exact description in the article you posted, I flipped them, and did change a few things in the process which showed how they can be benificial in the right spots. Too much of one thing can lead to another NO DOUBT!

I will go on to say the ISOCLEANS might have a better universal effect than the HIFI's which seemed more finicky, but clearly better in many areas than a standard fuse, mostly background distortion and clarity improves.

Neither power cords nor fuses nor super fancy cables will ever improve any system's sound.
It is phisycally impossible to improve it or reduce the loss.
However in case of cables (noitce not fuses or power cords) but cables ypou might introduce favorable loss of information or distortion that would be pleaseing to your ears, perhaps.
Plugging 3 feet of extra thick shileded braided etc. powercord between wall outlet and your unit is simply silly.
To improve anything ypou would have to run the same quality cable from the elctrical company power station staright to your apartment/house. Plugging 3 feet in between is doing exactly what?
Are you with me?
Well, the same goes for fuses.
Now put down the credit card and slowly back away.