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Thread: My JBL 4344 DIY Project!

  1. #1
    Junior Member
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    My JBL 4344 DIY Project!

    Hello friends,

    I am building a DIY 4344. There are two issues I cannot find an accurate info. I would really appreciate your help.

    1- I am using the 2123H midbass. But I cannot find the chamber volume the JBL has built in the 4344 MKII (which uses the same driver). What is the internal volume of the sub-chamber?

    2- I am using dual bass ports (using 4" ID PVC counduits). I don't know the exact length of the port (must be something between 11" to 12"). What is the exact length?

    I am using the 2235H woofer. The internal volume must be 5.5 cubic ft. Is that right?

    Thanks in advance.
    Thomas

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  2. #2
    Senior Member
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    Hi,

    I don't think the internal volume for sub-enclosure housing the 2123H ( within the 4344mkii ) was ever specifically revealed ( though 4313B used that mid in a 4345 creation of his ).

    If you do a site search ( using 4313B as the author + "subenclosure" as the key search word ) you might just find somewhere that he ( Giskard/4313B ) stated that JBL used .5cu' for all subenclosures holding 10" mids ).

    I looked around, but couldn't find this phantom reference ( though I know its embedded somewhere within this forum ).

    Giskard has fled the building ( and G.T. the senior designer doesn't post here anymore > apparently ).


  3. #3
    Administrator Robh3606's Avatar
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    It's .5 cubic ft That is what I used in mine.

    Rob

    http://www.lansingheritage.org/image...345/page02.jpg
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  4. #4
    Dang. Amateur speakerdave's Avatar
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    Arrow

    That spec is also in the pro enclosure guide for 2118 and 2123.
    "Audio is filled with dangerous amateurs." --- Tim de Paravicini

  5. #5
    Junior Member
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    Good morning guys!


    Thanks for the replies. I was away for work and had a minor hand injury... So I will build the midbass chamber (0.5 cubic ft).
    I will then brace the cabinet to reach the 5.6 cubic ft for the woofer.

    The only thing remaining is the length of the bass ports!

    I also wanted to thank Ian Mackenzie and Christo, for their helps and info (on email).

    .

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