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Old 29th July 2011, 05:26 PM   #1
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Question EnABL Intaglio Too?

Redirected from: EnABL - Listening impressions & techniques

Hi,

I haven't looked at this thread for some years now and I can't see myself reading all of it to find the word "holes".

I have a question, though, brought about by a need in one of my speaker boxes. When talking about baffle (diffraction or what not) treatments, has anyone experimented with a pattern of holes instead of bumps, i.e. intaglio instead of embossed? Around a driver, say.

Thanks,

Jacques
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Old 29th July 2011, 05:40 PM   #2
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Quote:
Originally Posted by dlr View Post
Just as it is with Enabl, the dimensions will be far too small to affect the frequencies associated with the baffle edge diffraction. Applied as you suggest, it can only make the response worse. That is not an effective method to address diffraction.

This should be in its own thread, since it goes to the objective.

Dave
Thanks Dave

I'm not particularly interested in technical details at this point. I should be able to figure them out if needed. Thus the "or what not". What I AM interested in at this point is whether anyone has ever attempted this and to what (subjective) effect.

No desire to cross swords at this junction either, but I don't think I have (or have supplied) enough information for a conclusion such as the one you seem to suggest, that "it can only make the response worse". I'm also not interested in addressing baffle edge diffraction as such.

Any experiences, anyone?

Jacques

Last edited by JacquesToo; 29th July 2011 at 05:43 PM.
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Old 29th July 2011, 05:50 PM   #3
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Old 29th July 2011, 06:15 PM   #4
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Quote:
Originally Posted by JacquesToo View Post
Redirected from: EnABL - Listening impressions & techniques

Hi,

I haven't looked at this thread for some years now and I can't see myself reading all of it to find the word "holes".

I have a question, though, brought about by a need in one of my speaker boxes. When talking about baffle (diffraction or what not) treatments, has anyone experimented with a pattern of holes instead of bumps, i.e. intaglio instead of embossed? Around a driver, say.

Thanks,

Jacques
I've tried to avoid the imbroglio into which the technical conversations on this subject have "evolved", but have been listening to treated drivers almost exclusively for the past 4 or so years.

So far the only treatment of which I'm aware to baffles and other enclosure panels have involved the application of patterns by addition of paint or thin vinyl - it's so much easier to experiment by moving painted or stick-on bumps than would be the case with divots.

In fact one of several pairs of enclosures that I have for a Fostex FE127E design has an application of EnABL, done by Bud. This is an already fairly low diffraction design, and the pattern seems to aid even further in box "getting out the way"
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Old 29th July 2011, 06:21 PM   #5
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Indeed, tuxedocivic. That kind of thing. Or any kind of thing for that matter. I'm not going to use the words "boundary layer" because I've witnessed what happens when one does. Aircraft wings have little pin-like protuberances on them, for instance, but those, rather obviously, protrude from the surface. I have little idea how or why (or indeed if) EnABL works. The support seems to be overwhelming and I'm certainly not going to assume some kind of psychological explanation for this, as many seem to do. The point is that one person's dented surface might be another's protrusions. B&W have something like that going on in their ports, not? (Though, conceivably, for specific reasons.)
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Old 29th July 2011, 06:22 PM   #6
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Default Intaglio whatever

Quote:
I've tried to avoid the imbroglio into which the technical conversations on this subject have "evolved", but have been listening to treated drivers almost exclusively for the past 4 or so years.
so why imply or worry about "technical" things if you don't want "technical" answers???

Intaglio...Imbroglio... I get it!!

clever...
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Old 29th July 2011, 06:26 PM   #7
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Originally Posted by auplater View Post
so why imply or worry about "technical" things if you don't want "technical" answers???

Intaglio...Imbroglio... I get it!!

clever...

if we can't laugh at ourselves (writ large), then WTF's the point?


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Old 29th July 2011, 06:32 PM   #8
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Thanks, chrisb.

I'm in agreement. The thing is that these "dots" sometimes have a bit of an aesthetic impact one might want to avoid on spousal grounds, amongst others. Perhaps dimples would charm more, all other things being the same. (Let's not pursue this metaphor too far..) B&W might even have noticed this.

(I promise I'll try not to use the B-name anymore.)

I might be framing myself as an EnABL heretic here. Please forgive me. It's not the intention.

J
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Old 29th July 2011, 07:30 PM   #9
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You'd need to do some substantial changes to hear a difference, little modifications like EnABL, holes, bumps and such have absolutely no audible effect.
Even strong edge diffraction is not immediately audible, it certainly is measurable, but I'm yet to confirm it's audibility.
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Old 29th July 2011, 07:52 PM   #10
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Certainly the use of an EnABL pattern made of holes has been discussed particularily in reference to OBs. One could even have a cascade of a number of rows with shrinking holes as you move inward. Besides any benefit from EnABL, i think that it would tend to make the edge of the baffle "fuzzy". Fuzzy was the idea behind the Karlson slot in the iBIBk, in that case, to make the length fuzzy with a hopeful smoothing of the ripple inherent in a BIB.

dave
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