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  1. Replies
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    Thatís a good point. Back in the day used 4...

    Thatís a good point.

    Back in the day used 4 inch cardboard tube.

    If the port was made of 3/4 inch mdf there would be an error with the external volume versus internal.

    I would go bigger...
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    No worries. Have fun and enjoy your project.

    No worries.

    Have fun and enjoy your project.
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    http://www.cieri.net/Documenti/JBL/Documenti%20tec...

    http://www.cieri.net/Documenti/JBL/Documenti%20tecnici/JBL%20-%20Enclosure%20Guide.pdf




    If you refer to the links below you will pretty well find everything you need to get a good results.
    ...
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    Hi Greg, If you are not familiar with...

    Hi Greg,

    If you are not familiar with calculating the bracing here is an example using 2 x 2 lumber

    This bracing represents shelf bracing that is typical of the enclosure bracing used in the...
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    Hi Greg, Richard has you on track for a nice...

    Hi Greg,

    Richard has you on track for a nice bass reflex system.

    For years l used to do lots of calculations to work out the net volume. I felt like l knew every inch of the design but still...
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    Thatís someoneís interpretation of the...

    Thatís someoneís interpretation of the construction.

    On basis of both woofers functioning below 100 hertz it really makes no difference to the drivers.

    But the acoustic output of both drivers...
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    What someone is prepared to pay is relative to...

    What someone is prepared to pay is relative to their means and what similar product might be worth in the market.

    I canít comment on the planned pricing in foreign markets because a number of...
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    What Widget said is correct. There is always...

    What Widget said is correct.

    There is always something new coming out in the consumer audio market.
    I am aware of some new product development that should surface in the next few months.

    About...
  9. Replies
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    Itís basically a new unused driver which can take...

    Itís basically a new unused driver which can take forty hours of continuous use to break in.(as published by Jbl).

    Mount it in a vertical position if you can so the cone mass is not weighing on...
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    These days finding a 2231H, 2335H (or a 2231A)...

    These days finding a 2231H, 2335H (or a 2231A) with the original cone is unlikely due to the fact that the original cone put in the basket by the factory would have been replaced with a Jbl recone...
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    Well it sounds like your having fun. When your...

    Well it sounds like your having fun.

    When your ready send me a Pm and l will help you with with the crossover network. I have measurements of both the woofer and the horn / compression driver and...
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    Hi Greg,

    That looks like a nice project for your new home.

    I am not clear if you plan to use these enclosures inverted (from the pic you posted)?.

    My impression was your earlier plan was to...
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    As l said l donít have the details. This...

    As l said l donít have the details.

    This solution came from Edgewound who has a detailed understanding of cone and driver baskets (magnets)

    All you need to understand is this is a last resort...
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    The effect of the higher flux is to raise the mid...

    The effect of the higher flux is to raise the mid range response.

    The additional mass compensates for this.

    I donít have the detail here but Edgewound our reconer expert advised on this work...
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    if you add mass it will behave like a 2235

    if you add mass it will behave like a 2235
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    Hi Ed, Itís good to hear stories of our Audio...

    Hi Ed,

    Itís good to hear stories of our Audio lives.

    With the smart phone now almost a permanent fixture a persons time is now taken up by just keeping up with all the Apps. The LHS is still a...
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    You might have to buy in 1000 lots. I think a...

    You might have to buy in 1000 lots.

    I think a detailed discuss on cones is best left for Edgewound.

    He can source cones and has the contacts.
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    The approach requires a Jbl cone kit mounted and...

    The approach requires a Jbl cone kit mounted and a full test of all TL parameters, impedance and response, distortion.

    The TL test calculates all aspects of the drivers.

    On the 2230 that...
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    Hi Budney, The only way to validate if this is...

    Hi Budney,

    The only way to validate if this is an equivalent kit is to buy it and have tested with a woofer tester.

    Stick with the facts.

    I would show the kit to a Jbl reconer locally if you...
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    Hi Alan, Great story. Here in Australia...

    Hi Alan,

    Great story.

    Here in Australia itís a supply problem. No product for two years.
    The advertising for Synthesis is still up but they canít get it.

    My impression from people l have...
  21. 300-1200 hertz is ideal for the 2123H. I...

    300-1200 hertz is ideal for the 2123H.

    I would use the 2397 (vertical on axis) as the design point for the crossover and start with LR24 for the 2123H pass band.

    You can apply delay on the...
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    Back to your local channel. l have over the...

    Back to your local channel.

    l have over the past couple of years bought a selection of reissues of my favourite albums l like to play regularly. These old albums have since worn out.

    The...
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    8 cu ft3

    8 cu ft3
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    Hi Todd, Love it.

    Hi Todd,

    Love it.
  25. They are all discontinued drivers now. The 2123...

    They are all discontinued drivers now. The 2123 was used in numerous SR installations and they are now popping up readily on eBay.

    I have heard them in rows of four in fixed installs with dual...
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