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In the Forum: Horn-Loaded Speakers
In the Thread: JBL 2226 2445 2405 3-way and a path forward
Post Subject: It is OK by me.Posted by Romy the Cat on: 1/25/2014
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Nope, it was not a joke. For sure it is not the “whole point in a compression driver” but it is very much derivative from the compression driver design and anything that a compression driver has on back is irrelevant and impact only resonance frequency but not the bandpass. If you look any compression driver that does not use fluid damping then you will see a complete neglect of anything on back. The back plate is located a few mm from diaphragm and any back reflections are not compatible with wavelength.

I do not feel the need to do any experiments with it as I did it a lot. None of my experiments indicated that I had any important difference in sound if my driver were operating well outside of own critical regions. I do not know what you did and I do not know what “own super lightweight paper compression drivers” you used. I am fine with any conclusion you find yourself comfortable. Just think about it: why compression drivers have no softening in back chamber and why those few that that do have it (some Klangfilms for instance) sound absolutely identically if you remove the softening.

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