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Thread: JBL 2360 Compression Driver?

  1. #76
    Senior Member 1audiohack's Avatar
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    Quote Originally Posted by oks81 View Post
    All interesting!
    Don`t know how beaming sounds like, so can`t say on my 2360`s...
    It may be hard to hear indoors with all the reflected energy most rooms have but as you walk off axis at some point you will hear the HF drop dramatically, like someone turned it off.

    You may have to drag one outdoors to really hear it.

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

  2. #77
    Member oks81's Avatar
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    Ok! thnx!

    Don`t think I bother to bring outside... Yes, the HF drops at som point sideways of course.
    But reading the 2360`s is good in normal living room as it spreads quite well.
    I don`t know as it`s the only horns at all I have experienced..
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  3. #78
    Member oks81's Avatar
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    Well..
    Maybe this is swearing in the church...

    Anyway, now I`m playing with BMS 4590 coax drivers in the 2360`s
    Crossover is 400 24dB LR.

    The BMS fixes the tweeter quite well up to 20k.

    Finding this to be a really good driver actually!

    Best
    oks
    Remember the history!

  4. #79
    Senior Member Lee in Montreal's Avatar
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    Quote Originally Posted by oks81 View Post
    Well..
    Maybe this is swearing in the church...

    Anyway, now I`m playing with BMS 4590 coax drivers in the 2360`s
    Crossover is 400 24dB LR.

    The BMS fixes the tweeter quite well up to 20k.

    Finding this to be a really good driver actually!

    Best
    oks
    That driver has always intrigued me. Maybe my next step. The only glitch is that driver is a two-way by itself. ;-)

  5. #80
    Senior Member Hoerninger's Avatar
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    Quote Originally Posted by Lee in Montreal View Post
    That driver has always intrigued me. Maybe my next step. The only glitch is that driver is a two-way by itself. ;-)
    two-way but coax.
    ____________
    Peter

  6. #81
    Senior Member Lee in Montreal's Avatar
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    Quote Originally Posted by Hoerninger View Post
    two-way but coax.
    ____________
    Peter
    Yeah. But that's another crossover point. ;-)

  7. #82
    Senior Member Hoerninger's Avatar
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    Quote Originally Posted by Lee in Montreal View Post
    Yeah. But that's another crossover point. ;-)
    Of course, but thinking about horn systems, too little numbers of crossover points means more directivity (longish horns)

    For example
    two-way: 40 Hz - 900 Hz - 20 kHz (Factor 22,5)
    three-way: 40 Hz - 320 Hz - 2,560 kHz - 20 kHz (Factor 8)
    four-way: 40 Hz - 188 Hz - 884 Hz - 4,2 kHz - 20 kHz (Factor 4,7)

    Klangfilm always used two-way systems devided at 500 Hz. But for the better systems they took two ore more speaker/horn combinations above 500 Hz. which I would like to avoid (personal choice).
    ____________
    Peter

  8. #83
    Member oks81's Avatar
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    Compared to using a tweeter like 2404 is that with the BMS coax you get a point source.

    But I never heard an 2446/2360/2404 combination so I can`t tell what sounds best.

    Also maybe a matter of taste
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  9. #84
    Member oks81's Avatar
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    Some facts

    For crossover between mid and high I only use a 3,3uF cap.
    Supid? Maybe...
    But fact is that mid in BMS don`t play high enough and tweeter don`t play low enough to meet in a perfect way to form a good filter.
    The standard filter that comes with the BMS4590P actually has an EQ function on the lowpass section to make the drivers sum better.

    Measure of the BMS mid in 2360, crossover 400 24dB LR

    Name:  BMS mid 400 24dB.jpg
Views: 832
Size:  62.8 KB


    Measure of high with a 4,3uF cap, later changed to 3,3 for good protection of tweeter.

    Name:  BMS Tweeter 4,3uF.jpg
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Size:  50.1 KB


    Both together:

    Name:  BMS uten EQ.jpg
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    The rest I fix in DSP.
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  10. #85
    Member oks81's Avatar
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    The BMS 4590 can be used down to 300hz.

    I have tested both 300 and 350 crossover, but it sounds bad in the 2360.
    Crossover should be 400 or higher.
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  11. #86
    Member oks81's Avatar
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    After EQ

    Name:  Vrengmåling BMS.jpg
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    400 24dB LR Highpass.

    Phase Measure i straight on crossover point @6khz.
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  12. #87
    Member oks81's Avatar
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    Question about Radian 1245 diaphragm:

    When I used both the standard ribbed Ti and aquaplas Ti diaphragms I found crossover at 600 to be the best.

    If swapping to Radian 1245 alu diaphragm with mylar surround, does this diaphragm maybe sound better trying to crossover at 500, maybe as low as 400 compared to the TI?
    Any of you guys maybe tried?
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  13. #88
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    Quote Originally Posted by oks81 View Post
    Question about Radian 1245 diaphragm:

    When I used both the standard ribbed Ti and aquaplas Ti diaphragms I found crossover at 600 to be the best.

    If swapping to Radian 1245 alu diaphragm with mylar surround, does this diaphragm maybe sound better trying to crossover at 500, maybe as low as 400 compared to the TI?
    Any of you guys maybe tried?
    I have said it before, and say it again:
    your woofers will do a better job in those frequencies than a compression driver.
    Oks, you will never escape my yapping about those resonant cabinets.

    Stop thinking and start building!

  14. #89
    Member oks81's Avatar
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    Quote Originally Posted by johanwholst View Post
    I have said it before, and say it again:
    your woofers will do a better job in those frequencies than a compression driver.
    Oks, you will never escape my yapping about those resonant cabinets.

    Stop thinking and start building!

    God damn johan!! Following me here also for making feel bad about those cabinets
    Yes, I will build new!

    Thanks for yapping! You are right about those old simple boxes!

    Reason for asking about Radian alu is not for me, only me and "Hornlyd" talking about them.
    I will stay with the BMS and probably ending up at 450-500 I think when new boxes arrive.
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  15. #90
    Member oks81's Avatar
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    Hi!

    Do maybe some of you guys have impedance curves for 2360?
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