Sorry -missed this earlier
Neither is anything else to do with electricity. At best (not achievable) you've got the speed of light. Very fast, but not instantaneous. Some companies -especially Nordost IIRC- tend to promote their leads on the basis of their propagation velocity & its percentage of c, which is fair enough & at least you can measure it, but seems a bit excessive for most uses given that we're talking about rather low frequencies, and a high percentage of something that travels at approximately 186,000 miles per second.
But audio frequencies by definition are not instantaneous.
Neither is anything else to do with electricity. At best (not achievable) you've got the speed of light. Very fast, but not instantaneous. Some companies -especially Nordost IIRC- tend to promote their leads on the basis of their propagation velocity & its percentage of c, which is fair enough & at least you can measure it, but seems a bit excessive for most uses given that we're talking about rather low frequencies, and a high percentage of something that travels at approximately 186,000 miles per second.I'm afraid you've lost me there. AC is AC. There is no 'direction toward' (or for that matter, a 'direction away from') the speaker, since current flows both ways. That's why, for e.g., providing the circuit topology is not changed, the series components in a passive filter can be placed in the nominal '-' lead rather than the nominal '+' with zero difference. There is no positive or negative, or 'direction'. They just got called that for convenience.
Why do guys continue to feed the trolls??
Jan
Jan
I am deeply impressed by "the laboratory", displaying a historical collection of measuring equipment - but no certs at all. This is Germany, a lab without any cert is a hobby room. Very professional, indeed. And the "report" - looks like a joke to every EE 😱
Resistance is of minimum importance in fuses but make for fancy measuring results. I'm obviously not affiliated with Littlefuse but they have some excellent papers about their products and they know what they are talking about. I do however admit that it is not easy to read through more technical papers compared to the well voiced marketeer nonsense, targetting any audiance that in many cases refuse to accept any sientific results.
The problem with fuse holders is that they are crappy as far as reliable connection is concerned.
Measure a fuse, remove and re-insert and you measure something else.
If you are not aware of that, removing, turning around and re-inserting will basically *always' show a difference. For the naïve user that means directionality.
If you want to get rid of that uncertainty you could, for instance, do 20 measurements one way, average them, and compare to 20 measurements in the other way, averaged. Not perfect but a lot better than just one sample each way.
Jan
The problem with your argument regrading fuse holders is even if there is an audible problem with them systemically or generally, which I doubt, the affect on the sound would be unpredictable. Whereas the affect on the sound of the fuse wire itself is predictable, transferrable and repeatable. You say fuse holders are crappy. Show me one peer reviewed study that shows there is an audible issue with fusechooders.
Almost guaranteed. Contacts are about the worst part of any wire, let alone a fuse holder. 50 years ago, my father, fresh out of the RAF where he had been a radio operator, briefly took a job with one of the defense systems contractors down in London, assembling the then-latest wire-guided munitions. Only wire-wrap connections were permitted. Nothing else even approached the required mechanical and electrical tolerances. Crimps / cold-weld and solder were complete non-starters (by MOD test specifications and requirements) -as for any kind of plug, holder or similar? Forget it. A lesson in connection quality he never forgot -and he spent the next 4 decades as an industrial electronics engineer, mostly in repairing & calibrating high-tolerance medical, laboratory & industrial systems either on the bench or in-situ -most of which was rather more application-critical than audio. 😉 He paid a lot of attention to connections.
I've skimmed. I'm not weeping. Looking over it, the first three things that immediately leap out are:
1/ What differences exist are [well] within a typical measurement tolerance for something at the mOhm levels, especially if care is not taken over contact cleanliness, temperatures etc.
2/ There are no details of the test setup and its calibration status that I can see, and
3/ The 'testing company' appear to be mysteriously recommending expensive products from, [drum roll...] themselves! Whoever would have thought it? You might almost think it was an infomercial. Wot? Trying to flog product? Perish the thought (slaps wrist). Naughty old Scott. 😉
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The crappy referred to measurements and electrical connection, which was clear from the context, but which you chose to ignore for effect. Ohh well.
I never claimed any audible effect (which would be ludicrous in any case).
Jan
Second that. Good wirewrap connections are gastight at the contact area and the two metals fuse to a very reliable interface.
I've done my share of it, even diy, but it's a time eater and large/ugly.
Jan
If the connection was so bad it started to spark, maybe that would be audible? 😏
That‘s a logical fallacy, nobody is claiming that a slightly lower resistance is responsible for the effect on the sound. I’m certainly not saying that. But if you look at the data on Hifi tuning’s website you will observe that the change in sound is related to the change in resistance. And it’s transferrable, repeatable and predictable. what the resistance measurements show is that fuse wires are asymmetrical both physically and electrically. it’s evidence of directionality, not proof.
One wonders where Littelfuse comes out on the fuse directionality debate. We know that audiophile fuses the manufacturers say are directional have sold at an alarming rate of more than 100,000 in the past five years or so. Isoclean from Japan does mark their fuses with arrows. More Evidence, no?
Skeptics love to play the game, what about this? what about that? Have you ever seen a fuse spark? Give me a break. And if it did, so what, it’s not repeatable, transferrable and predictable. Whereas directionality is. What’s next, if the house explodes maybe that would be audible?
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Uh, the fuse testing company was independent of the fuse companies. Many audiophile and stock fuses were tested. Better read again.
The article actually makes the point that the small differences in resistance don’t explain the relatively large differences heard in listening tests. And the lower resistance direction was always in line with the best sound. It’s repeatable, predictable, etc.
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I respect your belief in arrows and if that makes you feel better, go for it, all the way.
The reason Littelfuse doesn't address directionality -that I know of- is because there is no reason to do so. They won't make a fool of themselves.
Excessive sales figures only prove good marketing techniques.
And don't get me started on beeswax in fuses. 😈
The reason Littelfuse doesn't address directionality -that I know of- is because there is no reason to do so. They won't make a fool of themselves.
Excessive sales figures only prove good marketing techniques.
And don't get me started on beeswax in fuses. 😈
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Are they now? Where does it say that? I see 'GECOM Technologies GmbH' and a calibration number completely devoid of context as headers at the top of each page, but nothing to say they did anything at all. No information on test setup / equipment, conditions, calibration data, methodolgy, timings, analysis or anything else. Given the repeated references to 'Hifi Tuning' who mysteriously host the pdf, the fact that it repeatedly follows that name-check with 'gives the best results' (surprise!), and the improbable nature of the text content from any reputable testing company, it appears to have been written by themselves.
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Sure, it's just funny that all the arrows on the exotic stuff point in the same direction...towards my wallet, that is.
Not that you are anything better than the rest of us. 😉
It's like with a horrible accident - one doesn't want to, but can't resist to take a look.
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