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  1. Thread: Jbl 4349

    by pos
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    4,507

    Thanks for posting this! With such an high...

    Thanks for posting this!
    With such an high crossover frequency for a 12" woofer that was to be expected.
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    You really need to measure the output of your DSP...

    You really need to measure the output of your DSP and adjust from there, as it is both easier and (much) more accurate than measuring the drivers + room.
    By the way, do you have an accurate...
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    Hi Rob That spinorama might come from an early...

    Hi Rob

    That spinorama might come from an early prototype, but might not have passed the listening test... :dont-know:

    The UHF response drops off axis, but that is already pretty good for a 1.5"...
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    The listening axis is indeed right between the...

    The listening axis is indeed right between the horn and woofer, but you cannot use that for nearfield measurements as you would get a much higher angle that way that what you would get at...
  5. Rob, I can relate to your 3" vs 4" listening...

    Rob, I can relate to your 3" vs 4" listening impression here: the is a notable difference in dynamic that is hard to understand when looking at measurements.
    I also heard the same kind of difference...
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    Sorry for the confusion!! I will continue in...

    Sorry for the confusion!!
    I will continue in your large format comp thread: http://www.audioheritage.org/vbulletin/showthread.php?42373-Large-Format-Compression-Driver-Listening-Impressions
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    Amazing work Rob! Have you had a chance to...

    Amazing work Rob!
    Have you had a chance to compare the 2453 with the 2450SL sonically?
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    Hi Flodstroem, Mine was pretty old, probably...

    Hi Flodstroem,

    Mine was pretty old, probably first generation with the ASRC bug and extension card port.
    I remember the processor usage went up and down for no good reason.
    Maybe they improved...
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    Looks like a legit D2430K driver to me. The "M2"...

    Looks like a legit D2430K driver to me.
    The "M2" version (whatever that implies) exists with both the grey and yellow foilcals.
    What you need to look for here is the "M2 D2430K" paper sticker on...
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    300Hz is a difficult frequency to deal with when...

    300Hz is a difficult frequency to deal with when measuring in a room, but with a combination of close mic measurement and spatial averaging around the listening position (eg MMM technique) it can be...
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    Hello Herman, The TD4003 has two important...

    Hello Herman,

    The TD4003 has two important traits that need to be considered when choosing a horn:

    Its output diameter is 39mm, ie a bit larger than the 38mm of the JBL (and other brands) 1.5"...
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    Hey Barry, I'll take the opportunity to ask you...

    Hey Barry, I'll take the opportunity to ask you something, as I trust your option/taste on those things.
    I know you love both the 2020H and 2123H, but what about the 2012H then?
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    It was a pleasure, good luck with your project!

    It was a pleasure, good luck with your project!
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    Apparently they also stopped taking photos ...

    Apparently they also stopped taking photos

    85767
    85768
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    They still call it a DD67000:...

    They still call it a DD67000: http://www.avcat.jp/main/avnews/files/2019/06/DSC_7526.jpg :dont-know:

    What's more interesting here IMO is the new expansion studio monitor series
    85765

    Looks...
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    Or maybe Guido now works at JBL :D

    Or maybe Guido now works at JBL :D
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    Hello laszlo I have 16 of these mounting...

    Hello laszlo

    I have 16 of these mounting clamps.
    The distance from the base (baffle) to the flat part of the clamp (basket front) is 17mm.
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    http://www.audioheritage.org/vbulletin/showthread....

    http://www.audioheritage.org/vbulletin/showthread.php?41902-Building-my-dream-system-need-lots-of-advise!&p=425668&viewfull=1#post425668
    ;)
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    Hi Rob, That is pretty strange indeed, one...

    Hi Rob,

    That is pretty strange indeed, one would expect an exact same internal design between the two. Might be something related to an evolution of the build process that could also appear...
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    Good find on the SL diaphragms! I cannot read...

    Good find on the SL diaphragms!

    I cannot read the impedance measurement, the image got resized too small by the forum engine.
    Are your Be diaphragms 8 ohm versions?
    What MC2 models are you...
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    Nah, tik tok is the new shit! :barf:

    Nah, tik tok is the new shit! :barf:
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    I am using 120cm x 120cm panels on each side...

    I am using 120cm x 120cm panels on each side myself (4 120x60 panels in fact)
    The vertical dimensions let them cover the woofer reflection, and the horizontal one does increase the "reflection free"...
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    Hello Tom, I have my M2 mockups pretty close...

    Hello Tom,

    I have my M2 mockups pretty close to the side walls (around 30cm).
    I first tried a lot of toe-in (probably around 25°, still nowhere near as pronounced as your corner horns) but the...
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    What measurements would you need? spacing...

    What measurements would you need?
    spacing between pins?
    The difficult part to replicate will probably be the matching with the lower part of the horn.

    Regarding the female part, this is the same...
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    85490 "RoB 1" :D Very cool looking Robert!...

    85490
    "RoB 1" :D

    Very cool looking Robert!
    That is a one of a kind and very refined system for sure, and with these top components and well executed integration it is going to be top notch for...
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