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In the Forum: Horn-Loaded Speakers
In the Thread: Ultimate MF compression driver?
Post Subject: Monkeys in jungle...Posted by Romy the Cat on: 3/5/2012
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 haralanov wrote:
This experiment was made a few days ago by a friend of mine who is speaker repair person. The modified compression driver is Soviet made 1A-16. If you have the chance to compare the single layer VC vs. the original VC and to hear how much better the lower inductance VC sounds in reality, you will no longer question the inductance importance.
  
And you know that’s there is no methodology to assure that you change ONLY inductance. I can give you many different aspects that you have changed when you re-winded the VC but you want to see only inductance.
 haralanov wrote:
Come ooon, even the monkeys in the jungle know it is correct :-))

Everybody knows that acoustical filters has nothing common with the electrical/digital ones...

I am no monkey in the jungle and I do not know it. When I asked the very same question to my technical experts a few years back than they explained to me that phase rotation is properly of Q not the property of filter topology. Would it be electric, mechanical, digital or acoustic filter the relation between phase shift and Q will be the same.
 haralanov wrote:
The horns are not acoustical filters (although they behave like filters), because there is no sound absorbing material to absorb the HF part of the soundwave. They only boost the lower frequency range of their working spectrum, so their upper octave loses amplitude compared to their lower octave. This is called equalisation - not filtration (and it rotates the phase). The filtration is when you get a towel (or a paper cone) and put it in front of a given source of sound. And it does not rotate the phase :-)

It is incorrect. Horns do low pass filtration and they rotate the phase all across the horn axes. Each single mm of the horn length the phase is rotating. A filtration is not when you get towel in front of a given source of sound. A filtration is a frequency dependant change of speed… or the phase shift as the monkeys in jungle call it…

The Cat

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