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Line Array Waveguides

Printed From: Speakerplans.com
Category: General
Forum Name: Newbie Discussion
Forum Description: Newbie Discussion/Questions. Look less stupid here...
URL: https://forum.speakerplans.com/forum_posts.asp?TID=106105
Printed Date: 12 April 2021 at 2:35am
Software Version: Web Wiz Forums 12.03 - http://www.webwizforums.com


Topic: Line Array Waveguides
Posted By: LeGingy
Subject: Line Array Waveguides
Date 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



Replies:
Posted By: Elliot Thompson
Date Posted: 23 February 2021 at 10:24am
Hi.

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

Best Regards, 


-------------
Elliot Thompson


Posted By: toastyghost
Date 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" rel="nofollow - 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.



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