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Thread: Replacement diaphragm for JBL M9500

  1. #1
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    Replacement diaphragm for JBL M9500

    Hi,

    Does anyone know the model of the replacement diaphragms for the M9500? I saw some D8R2450SL and owner claimed itís replacement for S9500. I have the impression the M9500/S9500 uses 16 ohms diaphragms.

    thanks.

  2. #2
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    LHF member "sebackman" has intimate knowledge about your question ( re; name + diaphragm impedance ).

    I believe the replacement diaphragm is now NLA and also, was of unique design.

    Can't you just measure the good one you have left ? ( iow, measure it's DCR )


  3. #3
    Administrator Robh3606's Avatar
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    Quote Originally Posted by ngccglp View Post
    Hi,

    Does anyone know the model of the replacement diaphragms for the M9500? I saw some D8R2450SL and owner claimed itís replacement for S9500. I have the impression the M9500/S9500 uses 16 ohms diaphragms.

    thanks.

    Look here last page. The Imp is definitely 16 ohms nominal so an 8 won't work. You need a D16R2450SL or equivalent.

    Rob

    http://www.audioheritage.org/vbullet...hp?12060-M9500
    "I could be arguing in my spare time"

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    Quote Originally Posted by Robh3606 View Post
    Look here last page. The Imp is definitely 16 ohms nominal so an 8 won't work. You need a D16R2450SL or equivalent.

    Rob

    http://www.audioheritage.org/vbullet...hp?12060-M9500
    Thanks guys.

    Hi Rob, in one of the pages, it says LF 8 ohm load and HF 8 ohm load. I could not find any mentioned of 16 ohm load in the document. Are you able to point out how from the last page you deduced that itís a 16 ohm diaphragm?

    regards,
    david.

  5. #5
    Senior Member Don C's Avatar
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    The notes about 8 ohms refer to the test fixture that is used to characterize the crossover network. That part is not about the driver. The curve shown matches what we expect to see from a 16 ohm driver from JBL.

  6. #6
    Administrator Robh3606's Avatar
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    This is an 8 ohm vs 16 ohm driver. 2453HSL 8 and a 476Mg 16. If you compare them to the last plot of the driver measured on the horn you can clearly see it compares more closely to the 16 Ohm driver black trace in the graph.

    Rob
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    "I could be arguing in my spare time"

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    Quote Originally Posted by ngccglp View Post
    Hi,

    Does anyone know the model of the replacement diaphragms for the M9500? I saw some D8R2450SL and owner claimed itís replacement for S9500. I have the impression the M9500/S9500 uses 16 ohms diaphragms.

    thanks.
    D16R475Nd

    you can use D16R2451SL instead.

  8. #8
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    Thanks guys.

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