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In the Forum: Horn-Loaded Speakers
In the Thread: Vitavox S2 coupling
Post Subject: Regarding the centeringPosted by Romy the Cat on: 12/20/2008
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 decoud wrote:
Regarding centering: how about making the bolt holes on the ring oversize relative the bolt diameter so that there is some play in the position until the nuts are tightened? Obviously, one would have to have oversize spacers too.
There are zillion way to make it centerable. The key is not to how to center the driver technical but how to know that it is centered. It might not be so simple as one might think. In 400Hz horn it possible to take bug screens and to touch the crack between driver and horn until it will be not sensible. Wherever it will be shell be somehow marked. A big question HOW. In 250Hz horn is it more complicated and my hands for instance cannot reach the throat and I was forced to take bug screens off, paint the side of the S2 flare with silver and to beam light into the horn. Still, to mark what the holed would be and how it will be drifted after you tight the bolts are kind of complicated. If a horn a machined made then the maker can put marks for mounting holes. In case the horn is “homemade” then be prepared that the throat will not be a perfect circle and you would need to find a compromise in the driver centering. For S2, for any MF drivers that shoot above 5-7kHz, the axis centering is very important…

The caT

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