Simply put: if you want wider coverage (at least on plane) than roughly 60°, for a given throat size, horn length and shape, you'll need some sort of pinching/narrowing in the horn path in order to 'shape' the wavefront (and avoid beaming).
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Some may argue, "what about this?"
A (blue) horn and no pinching to speak of.
A (blue) horn and no pinching to speak of.
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I wonder wether the smoother oval diffraction slot of the 18s has less disadvantages then the ones on horns like all those RCF HF9... or the JBL flat-front biradials.
And I also wonder what the radiation of the Meyer one looks like.
Regards
Charles
And I also wonder what the radiation of the Meyer one looks like.
Regards
Charles
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Approximately like this:
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The Meyer is quite nice !
The throats of the 2" BMS horns do also look like the one on the Klipsch, i.e. quite simple actually.
While it shouldn't be that difficult to calculate throats with smooth transistions I guess it is quite difficult to make a mould/template for such a throat. Maybe practical waveguides for which the models/templates are made by the stretching of foil and or fabric are not that bad either.
Regards
Charles
Regards
Charles
The throats of the 2" BMS horns do also look like the one on the Klipsch, i.e. quite simple actually.
While it shouldn't be that difficult to calculate throats with smooth transistions I guess it is quite difficult to make a mould/template for such a throat. Maybe practical waveguides for which the models/templates are made by the stretching of foil and or fabric are not that bad either.
Regards
Charles
Regards
Charles
The HF950 is probably one of the best best horns on the market.
It's a shame RCF didn't deem it necessary to improve the quality of fit and finish.
The smaller RCF horns, cast/molded in one piece, are much better.
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If you compare the throat of the Seeburg horn to the Meyer X-10 horn and even to the K402, you'll notice some (subtle) similarities.
In my opinion, the K402 is also a diffraction horn, but not in the classical sense.
In my opinion, the K402 is also a diffraction horn, but not in the classical sense.
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Ah OK !
I quess this waveguide does still behave better than an old 2344 for instance. Or am I wrong ?
My gut feeling tells me that sharper shapes used for diffraction work better up to higher frequencies in achieving wide dispersion but smoother ones have less unwanted side effects (like uneven frequency resonse and horn honk).
Regards
Charles
I quess this waveguide does still behave better than an old 2344 for instance. Or am I wrong ?
My gut feeling tells me that sharper shapes used for diffraction work better up to higher frequencies in achieving wide dispersion but smoother ones have less unwanted side effects (like uneven frequency resonse and horn honk).
Regards
Charles
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