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Thread: DIY-project: JBL Kebnekaise S4365

  1. #151
    Senior Member 1audiohack's Avatar
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    Quote Originally Posted by bubbleboy76 View Post
    Kebnekaise 2.5
    I like it! I am a two woofer kinda guy. 3.5 way or different sub?

    Barry.
    If we knew what the hell we were doing, we wouldn't call it research would we.

  2. #152
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    Quote Originally Posted by 1audiohack View Post
    I like it! I am a two woofer kinda guy. 3.5 way or different sub?

    Barry.
    2.5 way. No sub, and no UHF, for now.

    Anyone who knows how exactly the ".5" augmenting woofer in the Everest2 is setuped crossover-wise (acoustically)? Where it overlaps the other woofer, and how it rolls off.

    Edit: Found some slopes here, but I do not know if it is electrical or acoustical target curves:
    http://www.audioheritage.org/vbullet...l=1#post301424
    Last edited by bubbleboy76; 06-18-2017 at 08:57 AM. Reason: Added link

  3. #153
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    Looks like an 6dB/oct rollof starting at 80Hz in the Everest2.

    Page 15 here:
    http://www.jblsynthesis.com/tl_files...s%20Manual.pdf

  4. #154
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    Quote Originally Posted by cooky1257 View Post
    First create a rectangle(550x550), then push/extrude that into a block(838mm tall) then use the line tool to mark off the top/plan and the push tool to chop away the bits you dont want-think removal of material like a sculptor.
    I got kind of that far. It is when trying to change things I get lost.

  5. #155
    Senior Member 1audiohack's Avatar
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    Looking at the measured response for the Lf woofer and its little board with two coils and caps makes me wonder.

    I haven't looked for the component values yet but there is more to it than a coil.

    Barry.
    If we knew what the hell we were doing, we wouldn't call it research would we.

  6. #156
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    Maybe it is a kind of first-order Chebyschev-like electrical slope on LF1 in the Everest2?
    Resulting in a first-order Bessel-like acoustical slope for LF1, with a bump down low compared to LF2.
    Attached Images Attached Images  
    Last edited by bubbleboy76; 06-22-2017 at 02:53 AM. Reason: changed from acoustic to electric.

  7. #157
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    Quote Originally Posted by cooky1257 View Post
    Gives you an idea of proportions...



    Thanks!

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