The Le depend at which freq you are measuring at, 1khz or 10khz.
But it had to take account of the voice coil height, and how much % of the VC is in the pole, as the pole will give additional inductance.
I use the above as I observed from them after so many years of building raw fullrange drivers
But it had to take account of the voice coil height, and how much % of the VC is in the pole, as the pole will give additional inductance.
I use the above as I observed from them after so many years of building raw fullrange drivers
((The ferrite version is 0.023mH, the neodynium is 0.11mH, a factor of 5 difference.
That seems a very large difference; the DC voice resistance, voice coil dimensions etc are the same.
BL is also similar (5.53 vs. 5.18).
Where does the large induction difference come from, or maybe it is a typo?))
This not a typo. These both Le values are low, very low.
No one audiophile will able to hear any difference,
even late night, no even Bruce Wayne.
Ferrite are the cheaper, call it best buy,
Alnico are the most expensive and best sound,
Neo are also expensive and the most powerful.
The different Le came from a different VC, lenght,
wire type, copper, alu, wire shape etc in a different Gap, poles, rings etc
That seems a very large difference; the DC voice resistance, voice coil dimensions etc are the same.
BL is also similar (5.53 vs. 5.18).
Where does the large induction difference come from, or maybe it is a typo?))
This not a typo. These both Le values are low, very low.
No one audiophile will able to hear any difference,
even late night, no even Bruce Wayne.
Ferrite are the cheaper, call it best buy,
Alnico are the most expensive and best sound,
Neo are also expensive and the most powerful.
The different Le came from a different VC, lenght,
wire type, copper, alu, wire shape etc in a different Gap, poles, rings etc
No. It has been shown before that it is a typo. Post #9.
In the original datasheet on the Tang Band website it is shown as 0.011mH. Still a factor of 2, but closer.
Jan
In the original datasheet on the Tang Band website it is shown as 0.011mH. Still a factor of 2, but closer.
Jan
Maybe, that "would" explain a difference, but I find it hard to believe that a Factory makes two speakers, in theory same model, only difference claimed being magnetic material (Ferrite or ceramic) and also changing "
different VC, lenght, wire type, copper, alu, wire shape etc in a different Gap, poles, rings etc" .... WTF?
Datasheets say nothing about that and it actually does not make any sense from a production point of view.
As of the imagined "pole piece saturation" explanation, I would expect that to be directly reflected in BL factor (B being a component of it) and yet it stays almost the same (5.18TM vs 5.53TM), 6.7% , right within manufacturing tolerance variations.
So only difference I can find is that NEO is conductive, so it allows some eddy current inside, while Ferrite is practically a perfect insulator and NO eddy currents inside.
Magnets are not geometrically "inside" the voice coil, but still very much part part of the whole magnetic system, and some induced line forces pass through them.
As of quoted "difference in moving mass" it is also negligible : 5.76g vs 5.99g , less than 4% and again well within manufacturing tolerance.
Operator applying just 1 drop extra adhesive more than explains it 🙂
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B difference between, say, 90% saturation and 99% saturation may be not more than few percentage points, if you look at flattening magnetization curve. But mu difference between 90% and 99% saturation may be quite substantial.
Just what we need a typo.
Maybe its another freq inductance, Le vary according the freq and its a whole freq range graphic like SPL amplitude.
Datasheets say nothing about that and it actually does not make any sense from a production point of view.
And why should the datasheet present a detailed compendium on VC to educate illiterates?
different VC, lenght, wire type, copper, alu, wire shape etc in a different Gap, poles, rings etc" .... WTF?
I won't educate you.
You certainly won´t educate ME, that´s for sure 😉
Been designing and manufacturing custom speakers for over 50 years now, some 15000/20000 delivered by now.
Really lost count.
By the way, are YOU Mr. Tang Band?
Didn´t know they were based in Brazil.
I think their workers prefer Chao Fan, not Arroz de feijão ....... maybe there is a reason for that 😉
If you are so smart next time dont make me questions Mr. Methuselah, google for it.
Hey, come on, he didn't question you.
You missed the answer that was already given, jumped in both feet first and your post was more like 'look how smart I am' than answering the question.
JMF's post #25 was just factual, no need to get upset. And certainly no need for an Ad Hominem.
Jan
You missed the answer that was already given, jumped in both feet first and your post was more like 'look how smart I am' than answering the question.
JMF's post #25 was just factual, no need to get upset. And certainly no need for an Ad Hominem.
Jan