Support Splines?
(..that's not what makes me think it's a diffraction horn with the diagram.)
The drawing clearly shows a pinch, but they may have learned that this was not such a good idea. Good that they learned, bad that they didn't correct the drawings.
LOL!(..oh, that was good laugh, thanks!)
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Actually it does look like there is one from the photo..
Yeah, I'm guessing it's a manufacturing plastic weld. (..joining connection plate to horn, assuming it's totally flat to that interior diameter.)
Their data sheet need's to be revised (IMO). Being familiar with CAD, what they are showing in their sheet is NOT what they are selling. (..and while the end-result isn't a bad thing, it does cause confusion.)
Maybe after they designed and drew up their pinched prototype, they just found it was cheaper not to pinch it... LoL
Your assumption is correct, btw.
It seems some are assuming that the pic in question accurately displays the inside of the horn flare /
I doubt that's the case since
the pinch in question is indeed clearly visible ( it's just that it only exists on the outside molding of the horn ).
..maybe, but I doubt it.
The "flair" in the 2nd diagram perhaps, but the 1st diagram has *2* concentric rings, and IF we were to consider it an exterior profile element then the splines that are also shown in that diagram would be shown fully as well. (..the splines are shaded-out behind the connection plate, as would the exterior "ring".) It could be that they are showing the plastic weld artifact (..but it's not a structural thing that would normally be incorporated into a drawing).
Additionally, the dispersion pattern they are showing in their PDF doesn't match-up with anything but a diffraction "pinch" for that 15-20 kHz pattern for a 1.4" diameter driver exit.
-in any event, a moot point (if somewhat interesting).
My mention of it in relation to the perceived "pinch" was solely to express a diffraction element characteristic of a diffraction horn or waveguide. ie. it's the concept that matters, not this particular horn/waveguide.
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all this over the mechanical drawing?
i think there's an assumption being made that one of the views is a mid line cut view, when in fact it's an "outside" view, so what looks like a "throat pinch point" is in fact illustrating an "outside" casting lines!
there's enough perceptual problems with audio let's not bring visual distortions into the mix!
late to the party Earlk beat me to it!
i think there's an assumption being made that one of the views is a mid line cut view, when in fact it's an "outside" view, so what looks like a "throat pinch point" is in fact illustrating an "outside" casting lines!
there's enough perceptual problems with audio let's not bring visual distortions into the mix!
late to the party Earlk beat me to it!
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I stand corrected. The middle drawing is indeed to not likely be a cross section, as I had assumed, but the outside of the waveguide, i.e. a fillet. There are not enough dimensions to be absolutely sure, but it does mean that the inside of the device is most likely not "pinched" - as claimed.
The wikipedia definition for PS is essentially similar in format to that of OS, as is to be expected.
Contains the formula to convert to Cartesian coordinates and nice colored pictures to help visualization, what is the problem?
Earl always recommends Morse, you could try Flammer.
Best wishes
David
I guess I can refrain from posting my pictures of the XT1464 horn front view. If anyone is still interested,please ask and I will post.
Since the subject of this thread is horns one can actually buy we can say that this definitley is one. The downside is its quite narrow radiation pattern. But it's advantages are that they can be obtained quite easily (at least in Europe) and that they are very smooth sounding. I assume that this is partly due to the fact that they don't have any diffraction slot.
An 18s horn WITH diffraction slot is this one here:
18 Sound XR1496C 1,4 Zoll Horn kaufen? | Bax-shop
If you compare it to the famous JBL flat-front bi-radial horns the diffraction slot is much smoother and it is oval shaped whereas the JBL slot is rectangular.
Is my assumption right that the 18s XR1496 might therefore have less HOMs than the old JBLs ?
Regards
Charles
Since the subject of this thread is horns one can actually buy we can say that this definitley is one. The downside is its quite narrow radiation pattern. But it's advantages are that they can be obtained quite easily (at least in Europe) and that they are very smooth sounding. I assume that this is partly due to the fact that they don't have any diffraction slot.
An 18s horn WITH diffraction slot is this one here:
18 Sound XR1496C 1,4 Zoll Horn kaufen? | Bax-shop
If you compare it to the famous JBL flat-front bi-radial horns the diffraction slot is much smoother and it is oval shaped whereas the JBL slot is rectangular.
Is my assumption right that the 18s XR1496 might therefore have less HOMs than the old JBLs ?
Regards
Charles