JBL Array 2235 Be project

Discussion in 'DIY Discussion' started by cooky1257, Sep 17, 2009.

  1. cooky1257

    Dev Moderator

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    Good work Frank. Personally, I'd have rotated the drivers clockwise slightly to ensure the top and bottom screws lined up vertically (sorry, but that would bother me). Otherwise, well done. I'd love to hear them some day.

    I also like the room acoustic equipment disguised as plants:D.
     
    Dev, Apr 9, 2011
    #81
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  2. cooky1257

    cooky1257

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    Dev,
    I have a very indulgent partner;-)
    I know what you mean about the bolts.
    I had little wriggle room, these drivers are wider than the JBL's, I wanted to but found I didn't have enough baffle spare either side to do it safely.
    Another thing I noticed was as the outer holes are on every other corner, had I just rotated one full edge for drilling I could have a mirror image bolt pattern.

    Cooky
     
    Last edited by a moderator: Apr 12, 2011
    cooky1257, Apr 9, 2011
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  3. cooky1257

    Markus S Trade

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    Wich street is that? I found nothing on t'internet.
     
    Markus S, Apr 12, 2011
    #83
  4. cooky1257

    cooky1257

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    Pro circles street:D.

    The TAD's are indeed excellent(1600x series) but the re-coning situation with some units and the rep for de-maging of s/h pro units added to the unavailability of JBL 1500al's or 1500fe's prompted what if? enquiries among engineers/pro installers that I know personally.
    With particular requirements of excellent midrange performance and up to 1.2khz xover, the unit mentioned most was the PDN.15BR40.
    Proof of pudding is in the listening of course and even if some TAD's came up I wouldn't buy-the PD's are superb.
     
    Last edited by a moderator: Apr 12, 2011
    cooky1257, Apr 12, 2011
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  5. cooky1257

    Markus S Trade

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    Thanks Frank. Interesting driver with very sensible parameters.
     
    Markus S, Apr 14, 2011
    #85
  6. cooky1257

    cooky1257

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    2 X JBL 2452H compression drivers and new 4" Truextent 4008 Beryllium diaphragms are winging their way from the US as I type. This will be the the final chapter in this project.
     
    Last edited by a moderator: Jun 2, 2011
    cooky1257, Apr 30, 2011
    #86
  7. cooky1257

    cooky1257

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    Nice spanking new diaphragms

    [
    Phase plug end on



    The 2452's ,Ti dias removed, gaps cleaned ready.



    The 2452's with their new dias dropped in.

    Fed with 300hz-20k sine wave sweep as the fixing screws are gently tightened up ensuring no buzzes evident. They went in very easily needing only one repositioning adjustment.
     
    Last edited by a moderator: Nov 4, 2012
    cooky1257, Jun 2, 2011
    #87
  8. cooky1257

    cooky1257

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    RTA @1m on axis for left and right JBL2452/Truextent Be4008/SAM1horns;

    [​IMG]

    [​IMG]

    +/- 1dB from 650-16khz near as dammit.
     
    cooky1257, Jun 4, 2011
    #88
  9. cooky1257

    Tenson Moderator

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    Very impressive!
     
    Tenson, Jun 4, 2011
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  10. cooky1257

    cooky1257

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    Thanks T,

    The 4 'bands' of peq was very easy to dial in-all cut no boost.
    There's a lot more to it than a flat frequency response I know but nonetheless bloody marvellous;-)
    The Truextent upgrade for the older 24** series JBL's is very worthwhile.
    Dropping a TX Be dia into the latest generation 2450/2452 JBL cores gets you pretty close to sota. That said the 2435Be offers amazing performance for silly money s/h.
     
    cooky1257, Jun 4, 2011
    #90
  11. cooky1257

    Markus S Trade

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    A really late response to this post.

    I contacted Philip Newell. He did not do a review on the 6332. Andy, If you happen to read this, who else could have done it?
     
    Last edited by a moderator: Sep 30, 2011
    Markus S, Aug 23, 2011
    #91
  12. cooky1257

    cooky1257

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    This was an enjoyable and relatively easy project to get together with results that far outstrip the initial cost. Try it you may be surprised.
     
    cooky1257, Oct 14, 2012
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