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Great! Thank you for the help.

At least that is good news. Now I "just" need to get another D16R2421, then I have 2 2420 with D16R2421 diaphragms to install in my 4333A's. I would, by what I have...

First of all thank you all for your replies.

Earl K: Unfortunately I have no digi cam at the moment, so I cannot take any pictures of the dark grey diaphragm. As I mentioned it looks excactly...

Hello forum,

I am "restoring" a pair of 4333A I've had for quite a few years now. They have always been sounding great ever since I got them, but during some free time I finally pulled myself...

Thank you all very much for your inputs regarding this specific topic. It is greatly appreciated! Now I have a better idea of how I am going to move on with my vintage JBL gear :)

:applaud:

Steve and Hoffmann,

I was wondering if you have any idea about how much it costs to regauss alnico magnets, and if it's possible to regauss the magnets without removing the diaphragm?

Thank...

Hello forum,

Question ... I know it is possible to recharge alnico magnets back to their respectable gauss values. Is it possible as well to recharge ferrite magnets? I own various JBL items...