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Thread: 2450 Dia

  1. #1
    Registered User paragon's Avatar
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    2450 Dia

    Does a 2450 Titan Diaphragm also fit in a 2441 ??

    Eckhard

  2. #2
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    Good Question;

    I've put 2445 diaphragms into 2440 and 2441 magnets with success. I've also put a 2450SL diaphragm into those same drivers with success - but then, the 2450SL diaphragm is just a 2445 diaphragm with aquaplas on it.

    "With Success ", I mean , I end up getting a response curve that is acceptable for that type of driver ( my tolerance is ▒ 3 db ).

    I've never had a 2446 diaphragm in a 2441 magnet .

    <> EarlK
    Last edited by Earl K; 10-11-2004 at 01:36 PM.

  3. #3
    Senior Member Guido's Avatar
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    Hey Eckhard!

    Do you have small and silent K2 thoughts?


  4. #4
    RIP 2010 scott fitlin's Avatar
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    Re: 2450 Dia

    Originally posted by paragon
    Does a 2450 Titan Diaphragm also fit in a 2441 ??

    Eckhard
    It can be done, this was what I was considering when we thought that JBL was going to discontinue aluminum diaphragms!

    It will work, but will not sound like the aluminum diaphragm.

  5. #5
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    Hi Scott,
    It will work,
    What sort of response curve did you get ?


    <. EarlK

  6. #6
    RIP 2010 scott fitlin's Avatar
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    Didnt actually do it......

    I never went ahead and actually did it, but an engineer had recommended this to me, and I spoke to JBL, and they said it can be done, this was back in `95, and word was they were going to stop making aluminum diaphragms! But they didnt, so neither did I.

    What I was told, though, is that the lower midrange end of the spectrum would become more prominent with the 2450 phragm!


  7. #7
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    What I was told, though, is that the lower midrange end of the spectrum would become more prominent with the 2450 phragm!
    Interesting

    I might be testing out this scenario sometime this month - as part of a fact-finding mission to see why one of my 2450SL diaphragms won't properly "fitup" into any of my 2440/1 magnet structures. ( I suspect Canada gets shipped a lot of "seconds" ).

    <> EarlK

  8. #8
    Senior Member Guido's Avatar
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    According to JBL spec sheets the 2446 and 2450 drivers use the same dia, have the same phase plug and have identical flux and BL.

    Why the heck the response is so different?

    2446 response according to JBL spec sheet:
    Attached Images Attached Images  

  9. #9
    Senior Member Guido's Avatar
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    2450 response according to spec sheet:
    Attached Images Attached Images  

  10. #10
    Senior Member Guido's Avatar
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    JBL Diaphragm D8R2450 - for 2446H, 2447H, 2450H, 2451H
    JBL Diaphragm D16R2450 - for 2446J, 2447J, 2450J, 2451J
    Attached Images Attached Images  

  11. #11
    Senior Member Guido's Avatar
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    JBL Diaphragm D8R2450 - for 2446H, 2447H, 2450H, 2451H
    JBL Diaphragm D16R2450 - for 2446J, 2447J, 2450J, 2451J
    Attached Images Attached Images  

  12. #12
    Senior Member Guido's Avatar
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    D8R2450SL and D162450SL should be same except aquaplas coating.

    D8R475ND (K2) should be similar without ribs and with aquaplas coating.

    Hope this is it!


  13. #13
    RE: Member when? subwoof's Avatar
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    "D8R2450SL and D162450SL should be same except aquaplas coating. "

    wrong. one is 8 ohm, the other is 16. both are coated as is the ribbed version D8R2450SL-A ( very late model DMS-1's used these )

    the privy:

    D8R2450SL

    D ( diaphram ) 8 ( impedance ) R ( replacement ) 2450SL ( model )

    substitute D with a C and you have the cone kit numbers ( cone )

    sub

  14. #14
    Senior Member Guido's Avatar
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    Clear subwoof. My fault!

    I meant D8R2450SL and D162450SL are the same than D8R2450 and D16R2450 except the coating.

    Of course one is 8 and one is 16 Ohm!
    Last edited by Guido; 10-13-2004 at 03:25 AM.

  15. #15
    Niklas Nord
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    I broke the two diaphragms in my K2 s9500,
    they look like this:




    Do you think they should be replaced with the same diaphragms, or
    should it be the original coated ones?

    I guess I have D8R2450 in my K2 now, and what┤s the diaphragm number
    for the original K2 475nd driver?

    Is the D8R2450 just a never kind of diaphragm? So I should be using this never one,
    or is it just the 475 original that it should be?

    I thought there maybe would be better strenght and upper HF detail in the D8R2450
    than the original...

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