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In the Forum: Horn-Loaded Speakers
In the Thread: Problems with horns: upper bass

Post Subject: Calculating an oval hornPosted by jessie.dazzle on: 8/1/2009

Dominik wrote :
"...Its sounds very good, but how to calculate oval profile. Above project comes frome tractrix calculator with one Roomy posted. There was "auto cad option".
I found "auto cad guy" give to him those numbers and he make all drawings in 10minutes. But he is not a horn person, he know nothing about horns..."

I don't know of any calculators that output data for oval horns, but this should not stop you.

Think of horn flare as a series of sections; the evolution of the area of these sections relative to each other is what determines the flare. You can deduce the flare for an oval horn by starting with a round horn; to make it oval, you need only keep the relative evolution in area (for each section) the same as that given by the calculations for the round horn, while keeping all transitions gradual.

You can calculate the area of any shape, so there is no reason why it can't be done, though it might not be so automatic.

Again, going with a lower cutoff for the upper-bass horn may not be desirable (see my previous post).

About your rendez-vous with the Avant-Garde horns : Don't be too discouraged if you don't like what you hear. I've heard Avant-Garde Trios once, and was very disappointed, however, the installation was done by someone who did not take the time (or have the knowledge) to get the best from them. The biggest problem was that the bass "horns" (Avant-Garde's horn subwoofers) were not even close to being properly integrated. What bass there was, was not pleasant. Also, the MF and HF horns were being driven by big solid state amps. I had the impression that I was listening with cotton in my ears.

jd*

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