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Thread: 2360A vs. 2360B white paper

  1. #1
    Senior Member grumpy's Avatar
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    2360A vs. 2360B white paper

    http://www.jblpro.com/pub/cinema/2360b_wp.pdf

    may be of interest to some... I had missed it until today.

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    Freq response for 2360

    Hi Grumpy,

    Know this thread is old but in my case I'm close to try this horn out. One thing makes me wonder. In this fine white paper for kbl2360a vs jbl2360b is several curves shown.

    Do somebody know if some of these curves/plots is done with a kind of "clever" EQ of the horn?

    On page 2 a frequency response is shown but this plot do not reflect the plots on page 5 in which the freqency response is more "flat". Someone who know's the details here??

    I will use the horn from 350Hz (-6dB LR 12dB) to 4kHz, with only coils and condensatores so I'm not able to give EQ..

    Regards Flemming

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    Senior Member ivica's Avatar
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    Quote Originally Posted by grumpy View Post
    http://www.jblpro.com/pub/cinema/2360b_wp.pdf

    may be of interest to some... I had missed it until today.
    Thanks GRUMPY for the 2360B data. I wonder is there any differences in the geometry of the the horn throat between 2360A (aluminum) and 2360B, as have happened in EV 9040 and EV 9040A.

    Regards
    Ivica

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    Quote Originally Posted by Flemming Skov View Post
    Hi Grumpy,

    Know this thread is old but in my case I'm close to try this horn out. One thing makes me wonder. In this fine white paper for kbl2360a vs jbl2360b is several curves shown.

    Do somebody know if some of these curves/plots is done with a kind of "clever" EQ of the horn?

    On page 2 a frequency response is shown but this plot do not reflect the plots on page 5 in which the freqency response is more "flat". Someone who know's the details here??

    I will use the horn from 350Hz (-6dB LR 12dB) to 4kHz, with only coils and condensatores so I'm not able to give EQ..

    Regards Flemming
    If you mean the On and Off Axis curves on page 5, everything was normalized to the 0 degree (On Axis) measurement, for easier comparison. Page 2 seems to be the actual frequency response (On Axis, one assumes).
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    Senior Member pos's Avatar
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    Quote Originally Posted by ivica View Post
    Thanks GRUMPY for the 2360B data. I wonder is there any differences in the geometry of the the horn throat between 2360A (aluminum) and 2360B, as have happened in EV 9040 and EV 9040A.

    Regards
    Ivica
    I have read that the only difference was in the finish and accuracy in the matching between throat and horn, not the geometry per se.
    If that is true, it should be possible to obtain similar results with a 2360A by carefully sanding and filling that transition...

  6. #6
    Senior Member grumpy's Avatar
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    Page 2 plots are the frequency response plots without EQ.
    Passive crossover examples exist to re-contour the 2360 horn
    (e.g. 3160). You'll want to be careful going down to 350Hz
    unless a phenolic diaphragm compression driver is used.

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    Quote Originally Posted by grumpy View Post
    You'll want to be careful going down to 350Hz
    unless a phenolic diaphragm compression driver is used.
    Yes I know :-)

    But I intend to use LR12dB and @350Hz the signal is already 6dB down. Compared to a 12dB butt @ 500Hz as recommanded the level is down 7,7dB @ 350Hz so I dont think I will run into trouble when using this in my living room. The biggest issue is if there is any output as low as 350Hz. To me the plot at page 2 seems to have a kind of filtering below 800Hz.... or?

    Reg. Flemming

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