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Thread: About to re-cone JBL 2225 to 2234/5 need advice

  1. #16
    Senior Member turnitdown's Avatar
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    The spider is in correctly. What your pictures suggest to me is that I need to put the spider on from the bottom of the voice coil so that the excess spider material folds down toward the coil. I going to try that right now. I'll be back.

  2. #17
    Senior Member turnitdown's Avatar
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    Earl, you were right.

    I flipped the spider over and I now have the look illustrated in those two pictures. The relief of the former above the spider looks right also. If you all agree, I can begin to glue it up. That won't happen tonight however. I have another frame I need to clean and then glue them both up at the same time. I'm ready for a glass of wine. Thoughts on whether it's ready?

  3. #18
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    Edited

    Quote Originally Posted by turnitdown View Post
    The spider is in correctly. What your pictures suggest to me is that I need to put the spider on from the bottom of the voice coil so that the excess spider material folds down toward the coil. I going to try that right now. I'll be back.

    Earl, you were right.
    I flipped the spider over and I now have the look illustrated in those two pictures. The relief of the former above the spider looks right also. If you all agree, I can begin to glue it up. That won't happen tonight however. I have another frame I need to clean and then glue them both up at the same time. I'm ready for a glass of wine. Thoughts on whether it's ready?
    I missed your most recent post.

    Yes, I think you're ready to glue-up ( assuming things are also jiving with the GordonW info that I linked you to ).




    PS: I also have here a generic 4" VC spider here ( from at least 20 years ago ) that has a very distinct collar ( it's un-used & the collar is not caused by the direction of application causing loose excess to bunchup ).

  4. #19
    Senior Member turnitdown's Avatar
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    Quote Originally Posted by Earl K View Post
    I missed your most recent post.Yes, I think you're ready to glue-up ( assuming things are also jiving with the GordonW info that I linked you to ).PS: I also have here a generic 4" VC spider here ( from at least 20 years ago ) that has a very distinct collar ( it's un-used & the collar is not caused by the direction of application causing loose excess to bunchup ).
    You are correct again. Once I flipped the spider, the material naturally fell into place. Many, many thanks. The plan is to glue them up as 2234s sans dust cap, put them in a 4507 cabinet (5 cu. ft.) and test them before I decide to add the mass ring. I likely will add mass because they're going to work as subs for the 4612s. In essence, a B380 under them...biamped with electronic crossover.

  5. #20
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    @RobH3606

    Hi Rob,

    If you still own it, could you please publish the static weight ( including dust-cap ) of your JBL 129H recone kit ( I'll assume that you have an applicable kitchen scale since you've dabbled in AquaPlas painting in the past ).

    FYI, having the static weight will help those others who now rely on under-weight aftermarket recone kits ( and their own attempts to bring them up to spec by adding eBay-available AquaPlas ).

    Thanks <> EarlK


  6. #21
    Administrator Robh3606's Avatar
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    Hello Earl

    I still have it. Have to find the scale will post it then.

    Rob
    "I could be arguing in my spare time"

  7. #22
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    Quote Originally Posted by Robh3606 View Post
    Hello Earl

    I still have it. Have to find the scale will post it then.

    Rob
    Thanks Rob!


  8. #23
    Senior Member turnitdown's Avatar
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    Adding the mass ring

    Do I use an epoxy or a lesser adhesive?

  9. #24
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    Quote Originally Posted by turnitdown View Post
    Do I use an epoxy or a lesser adhesive?
    2-Part Epoxy seems a reasonable choice for a part that might impact the pole piece ( inadvertently, of course ).


  10. #25
    Administrator Robh3606's Avatar
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    Agree you have to run them really hard for it to happen and once you hear it's likely you won't let it happen again.

    Rob
    "I could be arguing in my spare time"

  11. #26
    Administrator Robh3606's Avatar
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    @ Earl K

    86 Grams

    Rob
    "I could be arguing in my spare time"

  12. #27
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    Quote Originally Posted by Robh3606 View Post
    @ Earl K

    86 Grams

    Rob
    Thanks a lot Rob!


  13. #28
    Senior Member turnitdown's Avatar
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    Quote Originally Posted by Earl K View Post
    2-Part Epoxy seems a reasonable choice for a part that might impact the pole piece ( inadvertently, of course ).
    Common sense pointed me that way, but all y'all are more qualified to weigh in. Thank you.

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