[HAM] speakeasy high powered driver diaphragm specs

[Drew Hoelscher]

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