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In the Forum: Horn-Loaded Speakers
In the Thread: Macondo Frame modification.
Post Subject: Wisdom of making a good frame for hornsPosted by Romy the Cat on: 3/24/2008

Considering the conclusions of my recent experiences that I described in the following thread:

I would like to share some of my observation that the people who would go multi-way horns might find useful. Since this is a there about the Macondo Frame here are some conclusions that I ended up with Macondo. I know that I need to go for fine-positioning but my wondering was how to arrange it in context of the entire frame. What I concluded is that in context of Macondo I need to precise-position only one horn.

First I thought to precise-position tweeter. I got very cool .001mm slide table but then I changed my mind and figured out that a positioning of the MF channel is the keystone for Macondo time alignment.

Take a look at the image below


The red number indicates the importance of alignment between the channels. As you can see if I hard-bolt the MF and slide the tweeter then I would have 2 the most critical dimensions (1 and 2) that I need to position precise. In case if I hard-bolt tweeter then I have 2 less critical dimensions that I need to align (1 and 3).

Generals it is absolutely the best to have the Injection Channel precise-positioned but the Injection Channel runs 10-15dB down of MF channel so it is not as critical as it might feel. (Pay attention that I draw the diagram above running the Injection Channel at minus 3dB to MF Channel)

Anyhow, keep in mind that if you make a frame that does not need and alignment … then you are a genius and designed very good frame…

Rgs, Romy the Cat

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