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Thread: My DIY speakers "J&N"

  1. #1
    Junior Member jororaitchev's Avatar
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    My DIY speakers "J&N"

    Hello,
    I made a registration in this forum because I am a fan of "JBL". I do not know if this topic is appropriate because I did not see DIY projects , if the topic is not in the right place, please the administrators delete it.Excuse me!
    Joro


    A model of my DIY loudspeakers i have served Ti6k- JBL. My first contact with them, was in distant 2005.
    I started working with them in 2009 and finished in 2012.
    The loudspeakers are "SEAS"- Excel / Tw-1”, Mw-5”for center 2х 5.5”,Bass-8,5”/ and cross-over parts- "Intertechnik".
    Nominal impedance- 8 OhFreguency Range 30Hz-20kHzCharacterstic Sensitivity(2,83V/1m)- 87db
    Long Term-110W.
    Have are some pictures, if there is interest, i will continue.
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  2. #2
    Administrator Mr. Widget's Avatar
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    Beautiful work. I'm under the impression that these midbass drivers while extremely good sounding when used properly have some nasty breakup characteristics just beyond their normal operating range. How did you handle that? It seems most people use fairly steep crossovers to reduce their effect.


    Widget

  3. #3
    Senior Member grumpy's Avatar
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    Very nice. I'm sure I'm not the only person who would be interested if you have pictures documenting the enclosure build.

  4. #4
    Junior Member jororaitchev's Avatar
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    Before I start the comments in this forum I want to apologize for my poor English, do what I can!
    Excuse me!

    Joro

    Thank you all for the good evaluation of my work, thank you very much!
    In order to save time, I will allow myself a clarification:
    -Everything in this project-idea, design filters the overall workmanship of the cabinets to the last detail was done by my hands.

    Thank you for your attention!

    I wanna to show how was made the speakers are made;
    First did this "home-matrix";afetr, i bended 8 layers/ 4mm/ MDF.


    I will continue...


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  5. #5
    Senior Member svollmer's Avatar
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    Wow! They are gorgeous (beautiful)! Very nice work. I'd love to see more pictures of the assembly too.

    Great work; and don't worry about your English. It's good enough!

  6. #6
    Junior Member jororaitchev's Avatar
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    Quote Originally Posted by svollmer View Post
    Wow! They are gorgeous (beautiful)! Very nice work. I'd love to see more pictures of the assembly too.

    Great work; and don't worry about your English. It's good enough! :applaud:
    Thanks!

    After assembly, veneering with " Bird's Eye View", / "Bird's eye " veneer/;The finish is 35-40 layers of acrylic auto varnish and after each layer- polishing in order to obtain this:
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    Junior Member jororaitchev's Avatar
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    And now some pictures of the "dark side of the moon";

    That was all about this project. In a few days I will show you the rear- speakers project I am currently working on.
    Thanks for your attention!


    P.S. And some more last photos from this project;
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  8. #8
    Junior Member jororaitchev's Avatar
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    How about this project?

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  9. #9
    Administrator Mr. Widget's Avatar
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    Impressive!

    For the internal volume what is the ratio of MDF to air? It looks like maybe a third of that cabinet is going to be filled with wood? Not that there’s anything wrong with that but that is going to be one heavy pair of speakers!


    Widget

  10. #10
    Junior Member jororaitchev's Avatar
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    Quote Originally Posted by Mr. Widget View Post
    Impressive!
    For the internal volume what is the ratio of MDF to air? It looks like maybe a third of that cabinet is going to be filled with wood? Not that there’s anything wrong with that but that is going to be one heavy pair of speakers!
    Widget
    Thanks!
    The Internal volume calculation with complex shape and internal ribbing of the speakers /pure volume ratio- ribbing /, i do after designing a pilot model of the project., I'll show you how i do that on rear loudspeakers project.
    Yes, the speakers are getting heavy, but the idea of working this way is that I don't want to use acoustic insulation materials.
    The weight of this matrix is 18 kg.
    Joro

  11. #11
    Junior Member jororaitchev's Avatar
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    A few more photo positions;
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  12. #12
    Junior Member jororaitchev's Avatar
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    I will show you one of my projects, which I had to change basically right at the very beginning - the back speakers , let's go;
    The loudspeakers are "SEAS"- Excel T25CF002 ", W18EX001- 6,5"
    Everything is handmade, no "CNC" machine is used.


    First I paint the model as I like it / I do not like the standard prisms / I don't use 3D programs. I'm an electrical engineer and
    all I need is an idea, a pencil, mathematics, elementary geometry , a perspective view and that's it ...
    We all know, what is the ideal shape for the speakers. For technological reasons, it is difficult to do, especially with three tape loudspeakers. I strive to make the second most effective form - the egg.
    To begin with, I schematically design this way;
    I calculate the approximate volume, how do I find the right volume, will show you later in my project .
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  13. #13
    Junior Member jororaitchev's Avatar
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    Holy cow!
    What is the weight of these things?

  15. #15
    Junior Member jororaitchev's Avatar
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    Quote Originally Posted by bubbleboy76 View Post
    Holy cow!
    What is the weight of these things?
    The burden of "these things" - which one of them?



    https://www.facebook.com/groups/1046...?ref=bookmarks

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