Synergistic Red Fuse ...

I'm guessing I've got 80-100 of burn in on the Black that is in my Coincident CSL.  Tonight I did an A/B with the stock fuse.  Replacing the Black with the stock fuse made an immediately obvious difference.  Everything just went flat.  Very 2 dimensional, loss of dynamics, loss of harmonic richness.  Put the black back in and everything went back to what I have been hearing recently.  Amazing, how can a fuse do this?  I think I will be buying more.

Bill I'm glad that the Black fuses worked out for you,  I was confident they would be beneficial in your system. You'll likely experience further improvement up to the 150 hours mark. I believe that you'll be happy with these fuses in your Frankenstein 😊

Charles, 

Charles,  I am thinking that getting a pair of 3 A slo-blo is up next.  Both the Franks and my HAPZ1 take 2 3A slo's,  so it is almost a slam dunk that one of those will benefit substantially.   

A Dilema:

Okay, so I have been slogging my way through this thread with interest. I am not a big tweeker, but the praise for upgraded fuses on this thread and elsewhere is so overwhelming, and it is such an affordable tweek, that I am considering it.

However, when I contacted the manufacturer of my preamp for some fuse value details, I got this in return:

"On ‘super’-fuses:

[Manufacturer] de-recommends using aftermarket ‘super-fuses’ whose construction varies from the standard fuse provided by [manufacturer] and their use will void the warranty.

The units are designed for use with a standard fuse and any that varies from the electrical characteristics of a standard fuse may be a risk to the equipment or user, and invalidates the safety certifications of the unit from agencies like U.L. and C.S.A.

In addition, the clearly defined laws of physics would indicate a different fuse cannot possibly (positively) affect the sound of the unit, the fuse design can only have 3 possible outcomes:

1. Allow the unit to operate as designed;

2. Starve it of current or voltage lowering its performance;

3. Raise the amount of current that can pass through the fuse, which would damage the unit if an internal short were to occur (but have NO effect otherwise, as an electrical circuit operating normally will only draw the amount of current the circuit uses, no matter how much might be available)."

When it comes to anything having to do with electricity, I am a scared little bunny. I don’t doubt what you all are hearing with your fuse upgrades, but the email from the manufacturer scared the carp out of me. What do I do? I feel like a bully just threw my baseball into the lake.

I have followed this thread from the beginning, and I am also considering ordering a couple of blacks, based on this thread, so I do not consider myself closed minded.  But I see the logic of bondmanp's manufacturer comments above, and it makes me wonder how any fuse can actually improve the music. It seems that the fuse is not like a cable that has a signal flowing through it, we know that the cable metal conductor & covering can impact the signal?

It just seems a fuse can either allow more or less voltage to pass through, and/or somehow "filter" something bad out of the current passing through.  Is the latter the case here, that the fuse is filtering out something bad from the current?  I have read about the "special" properties of the fuses metal filament.  I have read all the testamonials and am not disagreeing, just wondering what is the source of the improvements.
Thanks,
George