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<blockquote data-quote="Peter Morris" data-source="post: 141425" data-attributes="member: 652">Re: Infocomm???Ivan, most “line-arrays” I know of use horns or wave guides for the mids and HF, not a bunch of &quot;Omni&quot; point sources . They are designed to control the vertical directivity to be between 5 and 15 degrees depending on the application.&nbsp; They use various methods to equalize the path lengths in the horn so they achieve a narrow vertical coverage in a relatively short horn.The classic is the V-Dosc wave guide. It based on a cone which has been cut on two sides by a plane so that a round source is converted to a line source.&nbsp;&nbsp; When you intersect a cone with a plane it can form a circle, parabola and an ellipse just like your paraline lens.&nbsp; In fact you can produce a family of different cones and interstation’s … and taken to the extreme until its flat you end up with your paraline.&nbsp; Or putting it another way if you squash the V-Dosc device you more or less end up with a paraline. (see first two pictures)Where normal drivers are used they must be small and close enough together relative to the frequency they are covering so that they form a line source– that’s the classic line array theory.&nbsp; If you look down the throat of your J3&nbsp; <a href="http://www.danleysoundlabs.com/products/loud-speakers/jericho/j3/" target="_blank">http://www.danleysoundlabs.com/products/loud-speakers/jericho/j3/</a>&nbsp;&nbsp; it has a bunch of holes or point sources where the output of the 15&quot; bass drivers entre the horn … it work because of this. Note they are on a curve to match the shape of the wave front ...&nbsp; just like the curvature of a fix angle &quot;line-array&quot; As I said some do it better than others and I particularly like your solution.<img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":)" title="Smile&nbsp; &nbsp; :)"&nbsp; data-smilie="1"data-shortname=":)" />~<img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":-)" title="Smile&nbsp; &nbsp; :-)"&nbsp; data-smilie="1"data-shortname=":-)" />~:smile:Paraline&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; V -Dosc&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; Turbosound&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Adamson&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; Danley&nbsp; J3&nbsp; &nbsp; .... also see&nbsp;&nbsp; <a href="https://www.youtube.com/watch?feature=player_detailpage&amp;v=b8cX5Xs_vZg" target="_blank">https://www.youtube.com/watch?feature=player_detailpage&amp;v=b8cX5Xs_vZg</a>&nbsp; at about 2.15 minutes.</blockquote>

[QUOTE="Peter Morris, post: 141425, member: 652"] Re: Infocomm??? [FONT=Calibri][COLOR=#000000][SIZE=3]Ivan, most “line-arrays” I know of use horns or wave guides for the mids and HF, not a bunch of "Omni" point sources . They are designed to control the vertical directivity to be between 5 and 15 degrees depending on the application. They use various methods to equalize the path lengths in the horn so they achieve a narrow vertical coverage in a relatively short horn. [/SIZE][/COLOR][/FONT] [FONT=Calibri][COLOR=#000000][SIZE=3]The classic is the V-Dosc wave guide. It based on a cone which has been cut on two sides by a plane so that a round source is converted to a line source. When you intersect a cone with a plane it can form a circle, parabola and an ellipse just like your paraline lens. In fact you can produce a family of different cones and interstation’s … and taken to the extreme until its flat you end up with your paraline. Or putting it another way if you squash the V-Dosc device you more or less end up with a paraline. (see first two pictures) [/SIZE][/COLOR][/FONT] [FONT=Calibri][COLOR=#000000][SIZE=3]Where normal drivers are used they must be small and close enough together relative to the frequency they are covering so that they form a line source– that’s the classic line array theory. [/SIZE][/COLOR][/FONT] [COLOR=#000000][FONT=Calibri][SIZE=3] If you look down the throat of your J3 [/SIZE][/FONT][/COLOR][URL="http://www.danleysoundlabs.com/products/loud-speakers/jericho/j3/"][FONT=Calibri][SIZE=3][COLOR=#0000ff]http://www.danleysoundlabs.com/products/loud-speakers/jericho/j3/[/COLOR][/SIZE][/FONT][/URL][FONT=Calibri][SIZE=3][COLOR=#000000] it has a bunch of holes or point sources where the output of the 15" bass drivers entre the horn … it work because of this. Note they are on a curve to match the shape of the wave front ... just like the curvature of a fix angle "line-array" [/COLOR][/SIZE][/FONT] [SIZE=3][COLOR=#000000][FONT=Calibri] As I said some do it better than others and I particularly like your solution.:)~:-)~:smile: [I]Paraline V -Dosc Turbosound Adamson Danley J3 .... also see [URL]https://www.youtube.com/watch?feature=player_detailpage&v=b8cX5Xs_vZg[/URL] at about 2.15 minutes.[/I][/FONT][/COLOR][/SIZE] [/QUOTE]

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