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A challenge to the "measurement" camp

I’ve watched some of his video and I actually agree on some of what he said,
but he seems too confident on his insistence on measurement. For those
who expound on the merits of blind test and measurement, why not turn
the table upside down?

Why not do a blind test of measurement? That is I will supply all the measurement
you want, can you tell me which is a better product?

For example, if I have a set of cable, and a set of measurement for each
individual cable, can you tell me which is the best cable based on measurement
alone? I will supply all the measurement you want.
After all, that is what you’re after right? Objective result and not subjective
listening test.

Fast forward to 8:15 mark where he keeps ranting about listening test
without measurement.  
https://www.youtube.com/watch?v=katmUM-Xelw

By the way, is he getting paid by Belden?  Because he keeps talking about it
and how well it measures.  I've had some BlueJean cables and they can easily
bettered by some decent cables.  
andy2
roberttdid
534 posts
 
A working theory of gravity. There are quite a few. In addition to the QM issue, scientists have had to make up the concept of dark matter to match relativity results to what they observe.  Why someone would feel the need to insist on something being right that they had no hand in developing, measuring or verifying, and for which their life would not change either way? Baffles me. Mr Pebbles?

djones512,445 posts07-08-2020 7:17amOur working theory of gravity is Einstein's theory of general relativity. It's held up pretty good so far. But we still haven't unified gravity with QM, either our working theory is right and we haven't figured it out or their could be another theory or a tweak of Einstein's theory. I believe the point is it isn't settled science.

djones51
4,947 posts
 
Maybe the Roman Space telescope will answer some of these questions on dark matter and energy. 
glupson
7,842 posts
 
"...some of these questions on dark matter and energy"
New Dark Matter?
djones51
4,947 posts
 
You realize that even the inductance vs. freq. of an actual inductor is not flat, don’t you? Now being a cable with distributive characteristic, I am not sure how it will be flat. Same for capacitance and resistance. They won’t be flat.

Measuring the LCR of a speaker cable which is all I’m asking, it should be flat in the audible range.

Figure 6 demonstrates a speaker cable with its electrical properties shown as symbols with no value. In an actual model we would insert the values that we measure on our cable under test into all of the symbols. Using math (or computer modelling software) we can determine if the cable is flat in its response.

We will demonstrate this by filling in the actual L, C and R values from a 10 foot, 16AWG stranded copper twisted pair cable that could be used for speaker level signals. The following table shows the values as a total measurement and as a per foot measurement.

Now we arrive at the lumped element model shown in Figure 7. When we calculate the cutoff frequency of this filter (the frequency at which the filter begins to attenuate the input signal, we find that it is well over 1MHz. This means that for audio signals, this cable is not decreasing the signal from the input to the output.


https://sites.google.com/view/pine-tree-audio/about/lcr-testing

When I asked for FR taken in room it would show the speakers and room swamp any cable differences. The peaks and dips would probably vary by no more than .1db at different points showing how little the cable matters to what you hear.
geoffkait's avatar
geoffkait
23,365 posts
 

roberttdid
His "theory" of skin effect at the frequency where he points it out is almost definitely wrong. W.R.T. inductance, changing, again, unlikely to be the effect of a simple cable. It is pretty much a given there are additional elements in this cable.

>>>>>>Even more disturbing perhaps, the signal in audio systems has no frequencies at all. Not in the power cord, not in audio interconnects, not in digital cables, not in wires, not in fuses, not in speaker cables. Voltage and current are frequency independent. It’s Nowheresville! 🤗
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