[HAM] speakeasy high powered driver diaphragm specs

[organtec]

Drew,
   If done properly the response remains pretty even. Altec and JBL,EV have
done this and still do in some applications.

-----Original Message-----
From: hammond-bounces at zeni.net [mailto:hammond-bounces at zeni.net]On
Behalf Of Drew Hoelscher
Sent: Thursday, October 12, 2006 5:03 AM
To: The Hammond Forum
Subject: Re: [HAM] speakeasy high powered driver diaphragm specs


Technically speaking, "throating down" a driver via an adapter into the
smaller diameter hole in the Leslie horn acts like a "anti-phase plug"
-- it give you a distinctly different set of peaks  and valleys than
those of the driver being mounted in the horn for which it was intended.

-Drew

organtec wrote:
> 1/?
> 2/?
> 3/ That thingy is what is known as a phase plug. It keeps the driver
output
> from having huge peaks and valleys in the horn output. It also keeps some
> frequencies from being inaudible due to phase cancellation on their way
out.
> And lastly it loads the diaphragm acoustically to help keep excursion
under
> control so it doesn't destroy itself. It is there for a reason. Keith
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