2. amps-preamps
  3. 1448317474

Synergistic Red Fuse ...

I installed a SR RED Quantum fuse in my ARC REF-3 preamp a few days ago, replacing an older high end fuse. Uhh ... for a hundred bucks, this little baby is well worth the cost. There was an immediate improvement upon installation, but now that its broken in (yes, no kidding), its quite remarkable. A tightening of the focus, a more solid image, and most important of all for my tastes, a deeper appreciation for the organic sound of the instruments. Damn! ... cellos sound great! Much improved attack on pianos. More humanistic on vocals. Bowed bass goes down forever. Next move? .... I'm doing the entire system with these fuses. One at a time though just to gauge the improvement in each piece of equipment. The REF-75se comes next. I'll report the results as the progression takes place. Stay tuned ...

Any comments from anyone else who has tried these fuses?
128x128oregonpapa
jetter
3,035 posts
 
I am the caveman here, I don't believe in wire directionality of bare wire, as it relates to carrying a signal. 
geoffkait's avatar
geoffkait
23,365 posts
 
jetter
119 posts
08-03-2016 7:14am
I am the caveman here, I don't believe in wire directionality of bare wire, as it relates to carrying a signal.


Just curious, with all the evidence for wire directionality that has piled up in the past twenty years, what evidence, technical or otherwise, do you have to support your belief that wire directionality doesn't exist?  Or is it just your gut feeling?


Ag insider logo xs@2x
cleeds
5,971 posts
 
andynotadam
"As I understand things around here, this is a thread devoted to sharing our PERSONAL experiences ... So, to put it bluntly, if you have no personal experience with these products, feel free to lurk, or to sincerely ask questions, but otherwise, please save yourself the agita and the wasted keystrokes, and let the rest of us get on with our little hobby.... "
Sorry, but these forums don't work that way. Everyone is free to contribute. Please feel free to ignore those renderings that are not of value to you. Please feel free to alert the moderators to inappropriate posts. To be as blunt as you, it's simply not your role - or mine - to limit discussion on these forums.
almarg's avatar
Ag insider logo xs@2x
almarg
9,670 posts
 
Geoffkait 8-3-2016 6:58 am edt
To be fair - and correct - the technically experienced here have been saying either that fuses ARE directional or that fuses MIGHT BE directional.
Not sure whom that might be. In any event, in the opinion of this technically experienced person (i.e., me) the best insight into the question of fuse directionality, at least in the case of AC applications, was provided in this thread by Ralph of Atma-Sphere. Some excerpts:

Atmasphere 5-23-2016 4:52pm edt
It has to do with the fact that the connections on fuse holders are not perfect. The act of reversing the fuse sometimes gets you a better connection. However, directionality really isn’t the issue. Similar to a power switch, the contact area of the fuse holder that is actually doing the work is a fraction of the total contact area. As a result, if you simply rotate the fuse in its holder, you will find that there is a best position where more of the fuse holder contact area is touching the fuse contacts. When the fuse was reversed, on occasion you got better contact or worse contact, which appears initially to be a directional issue, but that is really an illusion.

Interestingly, this effect is measurable as a voltage drop across the fuse holder. As you might expect, the less voltage drop the better. So it is possible to adjust (rotate) the fuse in the holder for minimum voltage drop and thus the best performance. A side benefit is the fuse will last a little longer as the operating temperature is reduced.

Atmasphere 5-26-2016 12:31pm edt
I joined this thread recently with some results on testing. Those results are that the directionality appears out of coincidence and that actually greater improvement can be had by rotating the fuse in the holder for best contact. The improvement is measurable and audible; descriptions others have made on this thread of what happens when you get the direction right accurately describe what happens when the contact area is maximized.

Occam’s Razor has something to say here! Given that a fuse has to be used in AC circuits and given that people report differences by reversing the fuse, and also understanding how fuses are inherently incapable of having directionality in any way whatsoever, the explanation that they somehow have an effect by reversing them in the holder is a fairly complex explanation: some sort of unknowable, unmeasurable quality of the fuse itself.

A simpler explanation is that the reversal is improving the contact area because fuse and holder are not dimensionally perfect and the fuse might sit better in the holder in one direction. By rotating the fuse in the holder without reversing it gets the same effect only more profoundly.
Regards,
-- Al

Post removed 
More to discover