Gee JN,
You got me all confused. Let us start with are we discussing the reactions in two insulated wires? 🙂
Thanks for the clear concise explanation.
ES
You got me all confused. Let us start with are we discussing the reactions in two insulated wires? 🙂
Thanks for the clear concise explanation.
ES
Oh, so they don't all sound the same??
But surely the specs show that any distortion is surely swamped by the speakers' distortion? No?
There were two branches. One was skinning, another was t Line and Lumped element models with settling time.
If we assume you are referring to non skinning, then the geometry of the wires is unimportant. Of course, parallel wires generally present far more inductance per foot. That is why you're liking the four paralleled twisted pairs over the single 10 awg. Lower Ls, and a settling time that is less dependent on load dynamic impedance.
John
'Load dynamic impedance'. That is the part that has me tied up at the moment. I have a mother of a dumb question coming but need to think it through more. As its not just dynamic, it's frequency varying and level varying. And longer term stuff such as temperature rise might even raise its head. Just not sure what point is being optimised for in this n-dimensional space.
Energize a voice coil with a kHz sine. Now, force it at a constant velocity in one direction. Half the time it will be assisting you, the other half fighting you.
The amp will deliver more current when it fights you. IOW, it requires more current for the same voltage. That is lower impedance by definition.
Given that the settling time is dependent on the relation between cable z and load z, you have setup an asymmetrical settling time for the hf signal.
If one channel has bass content but not the other, the bass itself will alter settling on one channel but not the other as a result of dynamic impedance variation.
To test for this, one must first understand it's existence, no? Anybody who is trying to design high end audio widgets should already be doing these kinds of tests.
Btw, I have referred to this in the past as eddy current dragging losses.
John
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I'm baaaaaack.
First one is what I also suggested. But for some reason that was an immediate - 'no' reply from the experimenter. Couldnt do that... I think this was also a Z matching config and/or a simulation of working environment.
#2 might be more possible but not #3. Yes, it is as to the app and could be guessed at with more input.
THx-RNMarsh
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The only apps that come to mind are z pinch, rail gun, x-Ray hohlraum, beam kickers, and possibly an EMP generator made by explosive compression of a charged superconducting solenoid.
Can't think of anything exotic though, I'm just a simple country Doctor..
Oh, just thought, why not fold the edges into a rippled geometry so that the outer path is much longer..
John
Here is the ultimate gift for those audiophiles who have to have it all! 🙄
A Gift for Music Lovers Who Have It All: A Personal Utility Pole - WSJ
A Gift for Music Lovers Who Have It All: A Personal Utility Pole - WSJ
That is almost what I have also. One huge transformer but only 2 others on it and they have little to no load most of the time... a tv in evening for one and a computer to work in CAD from home on the other. and they are not close to me. So most of it is all for me. The advantages of country living. ;-)
-RNM
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Pretty darn close.
Outer path much longer... i did that experiment on my own with low current/voltage strip line modifications for a proof of concept. it worked very well.
I was exploring the thought that on very thin pcb copper and wide enough trace, the Hf would travel on the left and right edge rather than down the middle or evenly distributed.
THx-RNMarsh
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RNM,
Can we assume you also use a power conditioner inside your house, the one you developed for Monster? In your case of being on a transformer with little other use I can see how that would be advantageous but for the average city dweller that isn't a real option. I think there are about 8 houses to a transformer where I live but it is hard to tell as the utilities are underground.
Can we assume you also use a power conditioner inside your house, the one you developed for Monster? In your case of being on a transformer with little other use I can see how that would be advantageous but for the average city dweller that isn't a real option. I think there are about 8 houses to a transformer where I live but it is hard to tell as the utilities are underground.
yes, I use that design I did for Monster distribution years ago... model something -7000. However, that is mostly a system for isolation from each piece of equipment plugged into ac power. Two Triple shielded isolation transformers driving individual isolation filters on each outlet. Most of our noise comes from within the home and from our connected equipment -- Audio-Video-Computer/ etc. So each gets filtered and isolated from one another.
THx-RNMarsh
THx-RNMarsh
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Too much pressure!!!
My example fits single driver systems the best of course.
A 3 way (ahem, a 3 way speaker) will test as driver impedance give or take at every single frequency, as in an impedance sweep test. When two frequencies are involved, the amp will see a more complex load, drivers paralleled. Three frequencies, all in parallel. So for a three way 8 ohm nominal, there will be instances where the V to I ratio is consistent with 8/3 ohms. A zip cord at 100 to 150 ohms driving that? How in the world to even model such a complex system of stimulus dependent settling times, never mind one getting close to the amp I/V limits dynamically. I laugh at the impedance sweeps presented, as if that's what music actuall does to the amp..
At least bi/triamping removes some part of the complexity, granted it raises others, but I suspect low level dsp is more exacting than passive crossovers...(well, my guess anyway).
I liked triamping because I could overdrive the bejeesus outta my system without hearing it much.
John
On THIS thread I would hope to discuss something useful for better understanding of audio. For example, the potential problems with audio wires to loudspeakers, etc, or perhaps inform us enough to avoid "mysticism and sales hype that is present in many instances, without irresponsibly disparaging much of the serious research aimed at improving the sonic qualities of existing audio equipment." (My very words in TAS 3/79 p 62)
Now can we remove the rest?
Now can we remove the rest?
Remove the rest of what? There has been a huge discussion about wires, loudspeakers, distortions to the parametrics humans use to perceive soundstage imaging "etc", and yet YOU have not engaged in that discussion.
Why is that?
All you've done is jump onto the pig pile when somebody dissed engineers.
Well, granted, it was a very accurate and deserving diss, but still....😀
John
yes, and partially explains why a really high current PA design help make speakers sound better.
THx-RNMarsh
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