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In the Forum: Horn-Loaded Speakers
In the Thread: Vitavox S2 with Electromagnets
Post Subject: An opening into magnetizing cavity?Posted by Romy the Cat on: 1/1/2010
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Be,

this is an interesting thinking and if you are correct and if there is an opening from front chamber into magnet assembly then the volume of the magnet chamber would certainly affect the sound of the driver. The point that I argue is that such an opening shall not exist. The whole point of a properly made compression driver shall have a very smooth and no ripples transition from the diameter of diaphragm to the diameter of the throat. Any sudden change, any step in the transition is absolutely not acceptable, not to mention an opening into another cavity. Now, saying that I do not insist that such as an opening do not exist. I was trying to recall it but it is not in my mind now. Let look at the common design of a compression driver – where do you see this opening would be?

compression_driver_cut_off.jpg

Anyhow, if such an opening into magnetizing cavity exists then I think it would be with the driver that have non-radial phase plug, like Altec after 808, RCA and many others. The drivers with radial phase have the last layer of the plug covers the diaphragm’s output, at least it is what I think.

Non-Radial_Phase_Plug.jpg

Radial_Phase_Plug.jpg

Anyhow, I certainly need to review this subject… The Cat

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