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Old 24th October 2009, 05:13 PM   #7191
SY is offline SY  United States
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At audio frequencies? Bull chip.
It's measurable. The audibility, a more pertinent question, is hypothesized and then accepted, but not actually tested.
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Old 24th October 2009, 05:14 PM   #7192
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Originally Posted by danielwritesbac View Post
Whack one end with the hammer and the "whack" appears at the other side, onto the nail, as the force has been conducted via the punch (a conductor).
I like that analogy - never heard it put that way before. Wonder how close it is? Physics guys - comment?
 
Old 24th October 2009, 05:18 PM   #7193
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Originally Posted by soongsc View Post
Yes, it was measured at the speaker terminals. It was repeatable at that time, which was probably at least a year ago. But interestingly, after I did some changes to my setup, some of the similar tests I've done could not be repeated. I have yet to figure out why. I cannot remember the exact amplitudes, only that the difference was very visible, and in the frequency range below 200Hz.
Thanks for the further info, soongsc. MLS signal, presumably? Do you remember more or less the signal level at the tweeter and at the soundcard? Have you eliminated test setup (especially connections!) as a contributor?

Again, my apologies for so many questions, I'm just trying to suck your brains dry.
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Old 24th October 2009, 05:19 PM   #7194
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I like that analogy - never heard it put that way before. Wonder how close it is? Physics guys - comment?
Far closer than the "electron jumping" ideas.
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Old 24th October 2009, 06:24 PM   #7195
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IOW, no evidence. That's a problem- you're not giving an opinion, you're making a fact-claim about a specific physical phenomenon. And that fact-claim makes no physical sense, is contradicted by experience (you don't see multiple traces on high speed oscilloscopes despite stranded wire in the probe leads), and the notion violates superposition. Not exactly a basis to wag your finger at Andy.

You can`t expect to ever see my point if you decide not to try out my suggestions. I know what I`m talking about, been using this knowledge for years. But still I`ve never seen any meashurements backing it up.


Btw; this jumpin-thing is just one of several unwanted things going on in multicore cables.
 
Old 24th October 2009, 06:37 PM   #7196
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Is there a suggestion on how to detect electron hopping? Why doesn't it happen in my scope probe?
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Old 24th October 2009, 06:41 PM   #7197
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It's measurable. The audibility, a more pertinent question, is hypothesized and then accepted, but not actually tested.
Of course. Milliken weighted an electron, must be audible as high frequency granularity.
 
Old 24th October 2009, 06:49 PM   #7198
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Of course. Milliken weighted an electron, must be audible as high frequency granularity.
No, the oil drop lubricates things.
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Old 24th October 2009, 06:50 PM   #7199
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Originally Posted by panomaniac View Post
I like that analogy - never heard it put that way before. Wonder how close it is? Physics guys - comment?
Oh, I was just trying to make the point that the speaker cable conductors don't work like a hose. A conductor is already full. Thus a properly working conductor is so fast that its unlikely to make any delay at the speaker.

Well, that's cool until. . . Howabout a super-fast speaker?
Point 1): 7" 4 ohm alloy cone woofer with about 70uF directly on the woofer terminals gets going pretty darned fast (dayton RS also uses about 1.3mh--especially nice if heavy gauge). Hey, don't barf at 4 ohm stuff--crossover inductor noise is halved, I can buy an inductor half as big and twice as thick on the same dime, thus inductor noise is only one quarter as much as an 8 ohm speaker (of the same price), and real reason is that I like to hear clearly a cello and other baritone notes without spending an embarrassing amount for it.

How does the speed of conductors apply to an unusually fast speaker like the one in the example?
 
Old 24th October 2009, 06:56 PM   #7200
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How does the speed of conductors apply to an unusually fast speaker like the one in the example?
Let me put it this way- when you turn the light off at night, can you get into bed before the photons go away?
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