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In the Forum: Horn-Loaded Speakers
In the Thread: Macondo Frame modification.
Post Subject: Vertical spacing between channels of Le HornPosted by oxric on: 9/16/2011
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 Romy the Cat wrote:

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

http://www.GoodSoundClub.com/TreeItem.aspx?PostID=6876

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

Rgs, Romy the Cat



Hi everyone,

I have spent hours coming up with all sorts of weird and wonderful, but at other times too rigid systems to support the various components comprising what I modestly choose to call Le Horn (AKA Rakeshorns). I have more or less decided on the final design but would like some thoughts on the issue of positioning the MF channel (400Hz tractrix - possibly 550Hz tractrix or 550 Lecleach after experimenting) with respect to the Upperbass channel and the tweeter in the vertical plane. My initial view was that I needed to leave about 5cm between MF (Vitavox S2) and my 96cm diameter UB115 horns and similarly between the MF and the ribbon tweeter (Lazy ribbon from Raal initially). I was prepared to leave a certain amount of overlap between tweeter and Injection channel (250Hz tractrix - possibly 320Hz Lecleach, if I decide to include this).

However, my latest view is that I need to reduce these vertical distances to the bare minimum and I am considering to have the UB115 and MF channels with no vertical gap whatsoever and likewise between MF and Raal tweeter, and have the Injection channel so low it covers upper part of Raal Lazy ribbon by 2-3 cm. The main constraint is that although the ceiling height is approximetely 235cm, there is a 40cm thick beam going across the room in front of the area where I want to position the horns which leave a floor to beam height of 190-195cm. The frame I have designed (not yet built) gives me a fair amount of adjustability but it would be great if I could position the supports more or less where they will end up being eventually. Any thoughts anyone?

Best regards
Rakesh



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