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RCA Interlinks: Influence of conductor material. MEASUREMENTS.

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maty

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Multi test – Influence of conductor material – Silver – Copper – Graphene – Gold?
https://alpha-audio.net/review/mult...nductor-material-silver-copper-graphene-gold/

[ We used the following materials for this test:
  • 1mm solid core Pure silver – 5N – coated – about 35 Euro per meter (price fluctuates)
  • 1mm solid core Single crystal copper with graphene – 150 Euro per meter (price fluctuates)
  • 1mm solid core Tinned copper, coated (wax / cloth) – Unknown
  • 0.5mm solid core Gold/Silver (Mundorf) – not coated – 15 Euro per meter
  • Standard DIY lamp wire – copper, stranded – 2 Euros per meter ]

MEASUREMENTS here

Block wave test – 5N silver vs. the rest.png


One of them:

5N Silver solid 1 mm (yellow) vs Mundorf solid gold/silver 0.5 mm (blue)

5N-Silver-VS-Mundorf-50-Ohm-out-1-MOhm-in-100-KHz-pulse.png
 

fpitas

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Just to be clear, these cables are to ship around digital data?
 

fpitas

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The horizontal scale is 20 ns per division. That means the frequency of the oscillations are in the order of 50 MHz.

View attachment 290644
Oddly, unterminated cables ring. I've rejected technician candidates for not knowing that. Welcome to the internet :rolleyes:
 
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maty

maty

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You are right. But the scale is ALWAYS the same.

There are more measurements. L, C and R too.

Impedance

Alle-kabels-Impedance-phase.png
 

fpitas

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ahofer

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Is there a written summary of the blind test methodology? I'd like to see this replicated as I'm more skeptical than you (given your comment on the site that this is dispositive).

Because this video so far is painfully badly done. Several minutes discussing break-in, incoherently. And comparing by youtube audio? With microphones they 'just discovered a problem with one minute before the broadcast'? This is is a bad joke. Do it properly, edit your damn video, release hi-res files for a foobar test (like Archimago). make that *highly* skeptical.
 
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maty

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Is there a written summary of the blind test methodology? I'd like to see this replicated as I'm more skeptical than you (given your comment on the site that this is dispositive).
This thread is about measurements. If we go into a discussion about the blind test, admins will surely close it, so each one investigates it on their own or watch the Live test video.
 

KSTR

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I feel comparing cables without keeping RLCD-parameters the same is almost as futile as comparing speaker drivers without EQing them to the same target.
OTOH, significant differences in waveforms even with identical small signal linearized RLCD values would suggest some strong nonlinearities, dispersion etc. where we finally could be onto something (naively assuming a successful blind test here, that is). That's the kind of experiment I would have liked to see...
 

voodooless

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So… “influences”? On what?
 

fpitas

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fpitas

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Yep. Their test setup is, let's say, uhm, problematic ;-)
Not for them. They probably drew a crowd of vindicated readers.
 

ahofer

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If we go into a discussion about the blind test, admins will surely close it.
Not my experience, I have a whole thread on blind tests, and there are many others. @BDWoody what say you?

The measurements aren't very interesting. What's interesting is whether those measured differences are *audble*. And that video is horrendous.
 

Cbdb2

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Snake oil all of it. For example: "Call us crazy, but long playback proved to make a difference." as in burn in. Yea I call them crazy. The blind test was a joke.
"the measurement in terms of frequency response and phase shows nothing. And this while differences in timbre are indeed noticeable."
And some ridiculous conclusions: "It is striking how different this cable sounds. Rhythmically it is different, but tonally there is also something that makes this cable characteristic:"
A cable changed the rhythm, the Noble prize for physics is in the mail!
 

ahofer

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Snake oil all of it. For example: "Call us crazy, but long playback proved to make a difference." as in burn in. Yea I call them crazy. The blind test was a joke.
"the measurement in terms of frequency response and phase shows nothing. And this while differences in timbre are indeed noticeable."
And some ridiculous conclusions: "It is striking how different this cable sounds. Rhythmically it is different, but tonally there is also something that makes this cable characteristic:"
A cable changed the rhythm, the Noble prize for physics is in the mail!
Well they tried. They should send the cables to Archimago or one of the members here to set up a proper file-based blind trial. I'm sure they would like to see it replicated ASAP.

btw, did they say what guage the zipline is? I couldn't tell anything from the Youtube sound, but there's some assertion of a consistent result here, and everything else is some weird material.
 

Sokel

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Last time I commented about one of their videos presented here I was accused by them for lack of empathy,cruelty that hurt their feelings as persons,etc.
As if I am such a person and as if they know my story for helping people.
So,I won't comment this time.

(but I may laugh,secretly)
 

ahofer

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No, they didn’t! It’s the usual Alpha Audio pseudoscience. It’s deliberate and it’s disgusting.
I don't know anything about these people beyond the godawfulness of their video. But I'm in favor of people, particularly those who still think 'burn-in' is a thing, performing blind tests and seeking replication. Even if I have a strong idea of the likely outcome.
 
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