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In the Forum: Horn-Loaded Speakers
In the Thread: Macondo’s Midbass Project – the grown up time.
Post Subject: Magnet Discharge and/or Chemical WarfarePosted by Paul S on: 6/2/2013
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Romy, it is rare for Alinco magnets to drop a charge "just like that", although time and/or physical shocks can diminish the magnetism considerably.  If you happen to know how much charge your drivers started out with, then you already know more than 99.99% of audio people.  Knowing this, you might be able to determine how far gone the charge is now, although finding out the reasons for the "sudden" discharge is another matter.  Whatever the reasons for any discharge, at some point the charge gets too low for proper driver operation.

I also wonder if there have been changes in the foam (or whatever) in the chambers that house the drivers?  I do know that some caulks, foams, and glues are chemically "incompatible", which can lead to degradation over time.  This might cause shrinkage, hardening, leak(s), or ???, and who knows what the sonic results of any of this might be?

Best regards,
Paul S

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