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Line Array Waveguides

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LeGingy View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote LeGingy Quote  Post ReplyReply Direct Link To This Post Topic: Line Array Waveguides
    Posted: 23 February 2021 at 1:14am
Hi everyone

Looking for some advise/education on waveguides

When you go searching online for waveguides (considering to make/experiment with a few line array boxes), they all seem to look like they're not cabable of the advertised 90, 100, 140 degree horizontal dispersion (hyperlink below to show what i'm refering to)

https://www.eminence.com/speakers/hornflare-detail/?model=LA-WG10

Is this only half of the final product??, so waveguide THEN 100 degree Horiz horn????
Or do you incorperate it into the actual box???

Thanks in advance for any advise
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Elliot Thompson View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Elliot Thompson Quote  Post ReplyReply Direct Link To This Post Posted: 23 February 2021 at 10:24am
Hi.

If you contact Eminence, they will send you the Polar Response.

Best Regards, 
Elliot Thompson
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toastyghost View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote toastyghost Quote  Post ReplyReply Direct Link To This Post Posted: 23 February 2021 at 6:42pm
Short answer: yes. Adding depth to the horn with the a smoother transitioning flare will improve directivity.

Here’s an example of a similar horn with directivity plots:
https://en.toutlehautparleur.com/media/catalog/product/datasheet/sica/Q07050A.pdf

Long answer: many line array systems only offer their stated horizontal coverage angle from ~2 kHz to 10 kHz. That includes VDOSC. Download the manufacturer GLL data for some of the boxes you’re familiar with and have a look at the horizontal isobars in the free AFMG GLL Viewer program. The horn you’re looking at and the equivalents are designed to handle the path length compensation part of the design, which is explained in the original papers by L’Acoustics’ Christian Heil with some lovely diagrams.

Not all horns are equal in how they do this, even at big name brands.

Edited by toastyghost - 23 February 2021 at 6:44pm
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