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Old 29th Apr 2020, 3:06 pm   #1381
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Default Re: The Audiophoolery Thread.

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You'll now have to replace the wall socket too, as that could make the tea taste even better?
Don't make fun of it. Start selling wall sockets. And special circuit breakers for the fuse box.
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Old 29th Apr 2020, 3:14 pm   #1382
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Nordost almost as whacky as the British Rail flying saucer
Was it serious or was he trying to outdo Pedrick?
https://en.wikipedia.org/wiki/Arthur_Paul_Pedrick
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Old 29th Apr 2020, 3:43 pm   #1383
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Default Re: The Audiophoolery Thread.

HaHa - looks like a great character was Pedrick!
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Old 29th Apr 2020, 4:13 pm   #1384
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Default Re: The Audiophoolery Thread.

It's really quite simple. A number of people just don't comprehend that a cable is conveying a signal E-L-E-C-T-R-I-C-A-L-L-Y and they treat the cables as if they were M-E-C-H-A-N-I-C-A-L in operation. Then they ponder what sorts of cables are needed to be able to convey both low frequency and high frequency vibrations.

It explains so much.

USB cables can give flaccid bass, particularly if they have too much plasticiser in the PVC. Reviewers only have to look at an item to assess its heft and stiffness and from that their finely-tuned minds can determine what it must sound like. It saves the publications a fortune in test equipment, and because they know what they're going to hear, publication deadlines aren't threatened by overlong listening sessions.

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Old 29th Apr 2020, 10:01 pm   #1385
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Default Re: The Audiophoolery Thread.

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Here you go - from Nordost's site (note the 8-9's wire; really?):

...
In the current economic crisis, where hospitality staff are homeless because their jobs and rented digs are gone, the thought that there are people who able to afford such things is deeply depressing.

And then to think that these purchasers might be working with numbers in their day jobs makes it worse. 99.999999% indeed!

Can anyone explain what might be meant or implied by a 'velocity of propagation of 88%'?
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Old 29th Apr 2020, 10:27 pm   #1386
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Default Re: The Audiophoolery Thread.

The velocity factor is 1/(c x root(LC)) . At RF. They have just changed that number <1 into a percentage by multiplying it by 100, for marketing reasons no doubt.

At low frequency, like audio frequencies such at mains 50Hz, it is entirely irreverent. Unless you have hundreds of km of cable...

There is a half way decent reference that covers transmission lines audio frequency here http://audiosystemsgroup.com/TransLines-LowFreq.pdf

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Old 29th Apr 2020, 10:27 pm   #1387
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Default Re: The Audiophoolery Thread.

Prevents unwanted floor-cable coupling effects
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Old 29th Apr 2020, 10:31 pm   #1388
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Default Re: The Audiophoolery Thread.

I'm still stuck wondering what 'Dual Mono-Filament' can be. If that is 2x1 then its just dual filaments surely.

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Old 29th Apr 2020, 10:33 pm   #1389
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Default Re: The Audiophoolery Thread.

something to cheer us all up
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Old 29th Apr 2020, 11:10 pm   #1390
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Default Re: The Audiophoolery Thread.

And this too http://audiosystemsgroup.com/AES-RFI-SF08.pdf . AES presentation on RFI and audio (both balanced and unbalanced)
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Old 29th Apr 2020, 11:15 pm   #1391
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Default Re: The Audiophoolery Thread.

I guess all this is the audio equivalent of astrology.

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Old 29th Apr 2020, 11:20 pm   #1392
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Default Re: The Audiophoolery Thread.

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I'm still stuck wondering what 'Dual Mono-Filament' can be. If that is 2x1 then its just dual filaments surely.

Ian
Monofilament as in fishing line. Thin plastic single-strand thread. They've wrapped it around a central cor or cable and use it to space off a screening braid. Dual means they've wound it with tro threads, one wound over the other as an opposite-hand helix

The 88% velocity factor comes out of the air-to-plastic ratio and the dielectric constant of the plastic.

The fun comes in contemplating why they bothered and what difference they thought it would make to the behaviour of the system using their cable. The only real effect is on the marketing guff.

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Old 29th Apr 2020, 11:22 pm   #1393
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Default Re: The Audiophoolery Thread.

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Prevents unwanted floor-cable coupling effects
But, still touching the floor in a roundabout way.

Though what would be cool is to be able to buy a set of mini replica pylons for anging cables in between, no technical reason for doing so but would be interesting none the less.

Something else, not really audiophoolery admittedly, was on another forum when toy got to talking about CD's and the interesting fact that one of their flaws is that the error correction was designed to counter there being tiny holes in the reflective layer, the reason being that early CD's weren't perfect and such tiny holes were happening during manufacturing and as such the error correction system was designed to allow for this9supposedly you can drill a small hole in a CD and it will still work!) .
Now in reality early problems with CD manufacture/duplication were quickly ironed out and as such the main problems were with dirt/scratches on the disc, this meant that the CD player would read some good data then some seemly good but mangled data then some more good data when the error correction mechanism is designed for a period of good data, no data then good data again, this is what causes the CD to skip and get stuck in a loop as it gets confused and cannot fix the error..
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Old 29th Apr 2020, 11:25 pm   #1394
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Default Re: The Audiophoolery Thread.

But those cables aren't new! they're made out of really old stuff.

The copper was made in the heart of a star which went nova, and you can tell by their temperature that it was at least a good while ago.

They've had a real burn-in and had billions of years to settle.

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Old 30th Apr 2020, 12:14 am   #1395
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Default Re: The Audiophoolery Thread.

That British Rail patent was accepted under the pre-1977 act ( serial numbers below 2,000,000) where the applicant was in practice always given the benefit of doubt (this was explicitly stated in the act). The view was that, if it didn't work, then the public wouldn't be inconvenienced.

Pedric died at around the time I joined the Patent Office. I did once meet the examiner who had dealt with his applications, and was shown a 4 drawer filing cabinet containing numerous annotated books and documents he had submitted. Pedrick evidently suffered from post-traumatic stress syndrome, and only used the patent system as a way of disseminating his ideas for the public good via a publishing medium that was disseminated around the world and would never go out of print. He never paid the sealing fee for any of his patents, so anyone could use them for free. Nowadays he could have used the internet. They weren't all daft: one that proposed reducing friction in ships by blowing small bubbles of air under the hull, seems to be used by some modern cruise liners.
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Old 30th Apr 2020, 9:42 am   #1396
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Default Re: The Audiophoolery Thread.

What will happen when high temperature superconductivity really gets to room temperature? Sounds like a plan to make money!

Let's ignore for the moment that these materials are ceramics, and have the ductility of a rich tea biscuit....
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Old 30th Apr 2020, 10:21 am   #1397
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Default Re: The Audiophoolery Thread.

If that happens, hokey claims about audible effects in hifi cables will be the least of our concerns. There will be some rather dangerous magnets around, and mankind will naturally create whole new types of weapons around them.

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Old 30th Apr 2020, 10:30 am   #1398
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Default Re: The Audiophoolery Thread.

The magnetic rail gun. Too true. Even with resistive magnets the latest ones can fire projectiles 100 miles.
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Old 30th Apr 2020, 10:33 am   #1399
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Default Re: The Audiophoolery Thread.

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Originally Posted by McMurdo View Post
Prevents unwanted floor-cable coupling effects
Frankly I'm disappointed in you with this post.

Why on earth would you compromise the operation of your £16,500 mains cable by putting it on a cheap cable lifter like the one you've linked to? You're just being ridiculous and, if I may boldly suggest, not taking the whole subject seriously.

You need at least two of these at a very minimum:

https://www.futureshop.co.uk/furutec...yABEgIy6fD_BwE

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Old 30th Apr 2020, 11:28 am   #1400
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Default Re: The Audiophoolery Thread.

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Quote:
Originally Posted by McMurdo View Post
Prevents unwanted floor-cable coupling effects
Frankly I'm disappointed in you with this post.

Why on earth would you compromise the operation of your £16,500 mains cable by putting it on a cheap cable lifter like the one you've linked to? You're just being ridiculous and, if I may boldly suggest, not taking the whole subject seriously.

You need at least two of these at a very minimum:

https://www.futureshop.co.uk/furutec...yABEgIy6fD_BwE

It incorporates "audio-grade ABS resin" IOW ABS, moulded for the base unit. And "NCF nylon resin to eliminate static charge". NCF stands for Nylon Carbon Filled, a perfectly standard technology. Stainless steel machined top and non slip feet.

For £310 a pop. They are clearly having a laugh.

For excellent damping I run my speaker cables over the carpet. Job done.

Craig
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