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In the Forum: Horn-Loaded Speakers
In the Thread: Macondo’s Midbass Project – the grown up time.
Post Subject: Certainly not an expert (as you know) but ...Posted by rickmcinnis on: 6/3/2013
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Boston had a cold winter this year.  Well, you have a cold winter every year!
I could see that an alnico magnet in an attic, which I assume is not heated, could be affected by the cold.
Have you ever monitored the temperature in the attic?
For that matter the heat build up in the summer could be taking its toll?
Just what you need a climate control system for your attic drivers!
From what I have learned about re-magnetizing it is unlikely, as resourceful as you are, that you can do this yourself.
Bite the bullet, take them out and send them to GREAT PLAINS AUDIO who will do it for you for a pittance.
They know what they are doing with vintage drivers.  
I would send both of them as I suspect is your intention.
Hope all is well, other than having weak woofers.
Take care,

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