Speaker Asylum

Strictly, they aren't phase plugs, but 'pole-piece extensions'

203.129.50.57

In Reply to: RE: phase plugs posted by mls-stl on April 06, 2008 at 08:36:21

Phase plugs are used in the throat of mid / treble horns, driven by compression drivers, and they do a different job to a PPE.

It halves the reflective distances across the cone, and thus smooths the transition/s in the dispersion behaviour of the driver, reducing distortion, too. Less hash!?

Making the beaming audibly more acceptable, but I don't think they reduce its energy by much, at all.

PPE's made of metal can provide some heat sink area for the motor, as well.

Warmest
Timbo in Oz
The Skyptical Mensurer and Audio Scrounger
And gladly would he learn and gladly teach - Chaucer. ;-)!
'Still not saluting.'
http://www.theanalogdept.com/tim_bailey.htm

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