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Help me here...

Printed From: Speakerplans.com
Category: Plans
Forum Name: 1850 and 186 horns
Forum Description: Discussion / Questions about the 1850 and 186 horns
URL: https://forum.speakerplans.com/forum_posts.asp?TID=91599
Printed Date: 22 February 2024 at 10:03am
Software Version: Web Wiz Forums 12.06 - https://www.webwizforums.com


Topic: Help me here...
Posted By: kr1sounds
Subject: Help me here...
Date Posted: 18 April 2015 at 12:39pm
What makes a folded horn go low? Is it the chamber size? length of the horn? Been looking around on the internet and there's all different answers which there most probably are but none say exactly what makes them go low

cheers Smile


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Replies:
Posted By: odc04r
Date Posted: 18 April 2015 at 1:43pm
If you're getting multiple answers you're not reading the right theory! And probably listening to what people feel is right rather then the maths.

You've left off another important bit of theory which is expansion coefficient. I.e. exponential horn, conical horn, linear horn? All of these variables act together to get the final response and if you define 2 then the other becomes fixed. (Ignoring rear chamber, compression ratio, porting etc)

In simple terms: Horn length is the key to cut off, mouth area is key to getting a flat response down to the cut off. Expansion coefficient depends on how you define those.

https://www.grc.com/acoustics/an-introduction-to-horn-theory.pdf is probably the best article on the net in regards to covering the basics of horn theory I have found. Understand that and you are getting somewhere.



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