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Thread: Difference Between 2445J and 2446?

  1. #1
    Senior Member
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    Difference Between 2445J and 2446?

    I have a chance to get a pair of 2445J. Is the difference in diaphragm material -i.e. Al in the 2445 and Ti in the 2446?

    How would the 2445J compare to my beloved 2441's providing they had the same diapgragm materials?

    I need drivers for an upcoming 2397 based project......

  2. #2
    Alex Lancaster
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    They are both Ti; 2445J = 4", 2" throat, 2425/6 1.75", 1" throat; There are a lot of posts of preferences between Al and Ti, Alnico and Ferrite, good luck.

  3. #3
    Senior Member Guido's Avatar
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    AFAIK there is no significant difference between 2445 and 2446.

  4. #4
    Senior Member grumpy's Avatar
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    The only difference I've been able to find in the documents for these drivers is regarding
    the phase plug design description, in that the 2446 uses what is termed a "Coherent
    Wave" design:

    http://www.jblpro.com/pages/pub/components/2446.pdf
    http://www.jblpro.com/pub/components/2445J.pdf

    Do they sound any different? I wish I had the resources to find out

    -grumpy

  5. #5
    Senior Member
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    Hello

    The 2445 and 2446 are the same driver body. The difference is that the 2445 used a smooth dome titanium diaphragm with the diamond surround and the 2446 uses a diaphragm that has small ridges pressed into it making it stiffer.
    The diaphragms are interchangeable so you can upgrade a 2445 to the 2446.
    I guess at high frequency the original 2445 diaphragm would distort in physical shape and pressing ribs into the diaphragm helps eliminate the problem.

    Mike Caldwell

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