High Efficiency Speaker Asylum

Posted by vetmedrobert@gmail.com (A) on October 30, 2009 at 08:04:24

I have a pair of diaphragms from JBL 2441s and am wondering if they are real JBL diaphragms. One has a date of Mar 02 88 on it with SP and a part # (?) 61435. The other has a date of Nov 03 1987, a circled SP, and a part # of 61435. The last digit is a bit smeared, it could be a 6. Any help would be greatly appreciated.

• RE: JBL 2441 diaphragms - weltersys 08:50:46 10/30/09 (2)
  In Reply to: RE: JBL 2441 diaphragms posted by vetmedrobert@gmail.com on October 30, 2009 at 08:04:24

  
  
  

  
  The picture above has a 2440 on the left, a 2441 diaphragm on the right.
  
  I think the 2441 on the right was manufactured in the early 1980's.
  I don't know JBL manufacturing codes, so can't help you there, but I know these are real JBL product.
  
  The 2441 has a black dot in the center on the other side.
  IIRC, the very first 2441s did not have the dot, which was added for a little center mass and continued as a feature.
  
  This 2441 has a number 61780 and 58747.
  

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  • RE: JBL 2441 diaphragms - vetmedrobert@gmail.com 08:59:51 10/30/09 (1)
    In Reply to: RE: JBL 2441 diaphragms posted by weltersys on October 30, 2009 at 08:50:46

    Thank you for the images, mine look like the one on the right except that they each have a single silver dot in the middle.
    

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    • RE: JBL 2441 diaphragms - weltersys 11:54:36 10/30/09 (0)
      In Reply to: RE: JBL 2441 diaphragms posted by vetmedrobert@gmail.com on October 30, 2009 at 08:59:51

      My memory may be wrong regarding the color of the dot, but the 2441 definitely has one :^)
      
      
      

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• RE: JBL 2441 diaphragms - zako 08:20:00 10/30/09 (1)
  In Reply to: RE: JBL 2441 diaphragms posted by vetmedrobert@gmail.com on October 30, 2009 at 08:04:24

  Does it have a diamond pattern surround ?? or a white mylar surround ??
  

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  • RE: JBL 2441 diaphragms - vetmedrobert@gmail.com 08:45:34 10/30/09 (0)
    In Reply to: RE: JBL 2441 diaphragms posted by zako on October 30, 2009 at 08:20:00

    Diamond pattern, no mylar.
    

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