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Thread: Crossover schematic for 4425?

  1. #1
    Senior Member Guido's Avatar
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    Crossover schematic for 4425?

    Does anybody have a schematic for the 4425 Network?

    I think its the 65934-00.

    Thanks

  2. #2
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    Re: Crossover schematic for 4425?


  3. #3
    Senior Member Guido's Avatar
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    Thanks Giskard!

    You are the fastest

    But are you shure? I meant the 4425 with the 2416 Driver and th 2342 Horn.

  4. #4
    Senior Member Guido's Avatar
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    Damned!

    Youre right. As always and I was blind

    Thanks!

  5. #5
    Senior Member Guido's Avatar
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    Now some details:

    L1 seems to be a inductance (coil) with fixed resistance. Where can I get this?

    What is the resistance of the L-Pads? R201 and 202

    Thanks for help!

  6. #6
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    "L1 seems to be a inductance (coil) with fixed resistance. Where can I get this?"

    I don't think JBL has any of these anymore. They are little 1.0mH air core inductors wound on plastic square bobbins and they have a DCR of 7.5 ohms. You should be able to get them custom wound or wind them yourself.

    "What is the resistance of the L-Pads? R201 and 202"

    I'm not sure. Call Dave at Pro Parts? Or send their support an email. They need to post a readable tech sheet for that system anyway...

    http://www.jblproservice.com/pdf/Stu...ies/4425LR.pdf

  7. #7
    Administrator Robh3606's Avatar
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    I am pretty sure they are 8 ohms Attached is a clean copy of the techsheet with the part numbers for the pots.
    Attached Images Attached Images

  8. #8
    Senior Member Guido's Avatar
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    I downloaded this unreadable techsheet to

    But thanks to Rob I now have a readable

  9. #9
    jandregg
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    I bought one of these coils of the same value 1.0 and 7.5 dcr from jbl pro just two weeks ago for a L46 that I am building. It cost $13.00. If you need the part number I can look it up on Friday when I get home.

    John

  10. #10
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    Cool!

    I've posted this inductor several times before in previous forums, I don't see it anywhere on this particular version of the forum so here it is again:

    57129 - 1.0 mH 7.5 ohm - $11.31 from Pro Parts

    Here's the other important coil that I've posted at least a dozen times, alas, all on previous versions of the forum:

    56138 - 3.5 mH 7.5 ohm - $15.63 from Pro Parts

  11. #11
    Senior Member Guido's Avatar
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    Ok, call me stupid but:

    Why can’t I take one 1 mH coil in series with a 7,5 Ohm resistor?

  12. #12
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    How about a 1.0 mH coil having a 0.5 ohm DCR in series with a 7.0 ohm resistor?


    ***

    Here, this will work -

    http://www.partsexpress.com/pe/pshow...=255-250&DID=7

    http://www.partsexpress.com/pe/pshow...er=004-7&DID=7




    Last edited by 4313B; 08-20-2003 at 09:02 AM.

  13. #13
    Senior Member Guido's Avatar
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    Again Thanks!

    Now I can start to rebuild.

    Here is an link to an excellent site for X-over and speaker components.

    It's switchable to english and the ship overseas.


    www.intertechnik.de

  14. #14
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    Ok, call me stupid but:

    I don't see where to switch it to English

  15. #15
    Senior Señor boputnam's Avatar
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    I don't think you're stupid - I don't see it either, and gave-up, just shy of Registering!
    bo

    "Indeed, not!!"

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