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Direction of aftermarket fuses (only for believers!)

It is with reluctance that I start another thread on this topic with the ONLY GOAL for believers to share their experience about aftermarket fuses.
To others: you can call us snobs, emperors w/o clothes,... etc but I hope you refrain posting just your opinion here. If you did not hear any difference, great, maybe there isn’t.

The main driver for this new post is that I am starting a project to mod my NAD M25 7 ch amp for my home theater. It has 19 fuses (2 per channel, 4 on the power supply board, 1 main AC) and I will try a mix of AMR Gold, SR Black and Audio Magic Platinum (anyway that is the plan, I may try out some other brands/models). As it is reasonably difficult to change them, esp the ones on each channel module that requires complete disassembly, I would like to know what the direction is for these models mentioned and of course, others who HAVE HEARD there is a difference please share your experience on any fuse model you have tried.

Fuses are IME directional:
Isoclean is one of the first to indicate the direction (2008/2009) on their fuses. Users of HiFi Tuning (when the awareness rose quite a bit amongst audiophiles) have mostly heard the difference.

As an IEEE engineer, I was highly skeptical of cabling decades ago (I like the speaker design of John Dunlavy but he said on many occasions that cables nor footers matter at all, WRONG!). Luckily, my curiosity proved me wrong as well. I see the same skepticism that I and many others had about the need for aftermarket cables many, many years ago now on fuses and esp on the direction on fuses.

Another example is the direction of capacitors (I do not mean electrolytic types). Even some manufacturers now and certainly many in the past did not believe it can make a difference sonically. Maybe some do but it takes time in the assembly to sort and put them in the right direction/order (esp as some of the cap manufacturers still do not indicate "polarity") so that maybe is one argument why this is not universally implemented.








128x128jazzonthehudson
geoffkait's avatar
geoffkait
23,365 posts
 
Jea48 wrote,

"Jmho, the differences heard in SQ is not from minuscule resistance of the fuse element inside the fuse that measures higher in one direction than the other, which is said to create a minuscule VD across the fuse element, measured in a live completed circuit from fuse end cap to end cap."

No one ever said or suggested differences in sound quality are due to the minuscule differences of resistance of the fuse element inside the fuse. That’s a Strawman argument. Even the independent tester for HiFi Tuning states on the data sheets that the very small differences in resistance DON’T EXPLAIN the (obvious) differences in SQ. All the resistance measurements are intended to show is that that ARE measurable differences, thus an indication that SOMETHING is going on. As I stated earlier on this thread somewhere and as HiFi Tuning intimates on the data sheets, distortion and noise measurements might be more uh revealing in terms of sound quality.

Geoff Kait
Machina Dynamica
no goats no glory
Post removed 
jea48
4,554 posts
 

I’m reminded of a post by herman.

Quote:

"If you say the AC fuse blew because there was too much current flowing through it everybody nods in agreement even though that isn’t true. If you say the wire in the fuse melted because it got too hot after absorbing energy from the electromagnetic wave people look at you like you are insane and want to argue that vibrating electrons constitute current flow."




geoffkait's avatar
geoffkait
23,365 posts
 
jea48
2,095 posts
06-01-2016 7:31pm
"I’m reminded of a post by herman."

Quote:

"If you say the AC fuse blew because there was too much current flowing through it everybody nods in agreement even though that isn’t true. If you say the wire in the fuse melted because it got too hot after absorbing energy from the electromagnetic wave people look at you like you are insane and want to argue that vibrating electrons constitute current flow."

Interesting.

;-)



terry9
2,354 posts
 
Nice quote, Jea. I find the same thing when I quote mathematics. Everyone's ignorance trumps my expertise. Ah well.

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