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  1. Replies
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    Wow! This was a really unexpected and nice...

    Wow! This was a really unexpected and nice surprise: seeing my old 4425-thread resurrected like that!

    Thanks for your questions - which I, unfortunately, cannot answer.
    The 4425-DIY's are long...
  2. Hi. This is a long time ago - but this is...

    Hi.

    This is a long time ago - but this is definitely my measurement. And as Earl says: in my knock-off boxes, which is ported and at about 54 litres internal volume.
    And indeed there are two...
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    1,591

    The 2384 waveguide is (AFAIK) available on...

    The 2384 waveguide is (AFAIK) available on Speaker Exchange.

    Compared to the STX, the 2384 maintain pattern control and smoothness a bit deeper down. In my systems, I have had best results with...
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    Screws holding the back cup on a 2450 driver

    I broke the screws holding the back cup on one of my 2450 drivers.:banghead:
    See picture

    76369


    Anyone knows the correct screw dimensjon for this one?
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    I have used the 2251J, 2250H and 2169H in many...

    I have used the 2251J, 2250H and 2169H in many projects - all in various midrange horns.
    They are very good drivers.

    The 2250 and the newer replacement 2169 both work exceptionally well with...
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    3,827

    All those mentioned are excellent units, and...

    All those mentioned are excellent units, and was/is used a lot by JBL in Vertec/VTX, STX, VRX, HLA and Cinema systems.
  7. 1.3 inch throat?

    The EV HR9040 is a real interesting horn, and I have alwas wanted to try a pair - but the documentation
    ...
  8. Thread: Fix/recone D2430K

    by jerv
    Replies
    3
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    2,403

    Not correct. See...

    Not correct.
    See http://www.jblproservice.com/pdf/Transducers%20Parts%20List/Transducer%20Cone%20%20Diaphragm%20Price%20List%2006182014.pdf

    Diaphragm D32RD2430: $384.93
  9. Hi Bruno. I have a combination much like...

    Hi Bruno.

    I have a combination much like yours: with the CMCD-81H as a midrange unit and PT waveguide on top of that. Very nice combo.

    I have tried various high frequency drivers, including the...
  10. Replies
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    5,009

    No matter. The bigger the fixation rings - the...

    No matter.
    The bigger the fixation rings - the smaller (and lighter) the diaphragm.

    d8r075 have the smallest fixation rings, and is standard in 2404H-1 and 2402/075. Heavier diaphragm: more...
  11. Replies
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    The diaphragms with the biggest "suspension size"...

    The diaphragms with the biggest "suspension size" has of course the least diaphragm area (as your illustration clearly shows), and therefore also has the least moving mass (i.e. "lighter") in...
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    Sorry - this is not correct. There are three...

    Sorry - this is not correct.

    There are three different ring radiator diaphragms: the "heavy" one normally used in 2402/075 and 2404H-1, the "light" one normally used in 2405/07 and 2404H - and...
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    11,525

    Use a big box!

    Well - the E145 actually have more bass then the 2235, given a box that is big enough. Put the E145 in 275 liters (9 - 10 cu.ft) at tune it to 30 Hz, and you will have more bass level all the way...
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    Hi, Mårten. I also have an old pair of D130's....

    Hi, Mårten.

    I also have an old pair of D130's. Did you try the paper surround conekit from Sound Speaker Repair?

    Cheers, Espen
  15. Replies
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    I know for a fact that JBL 4" dias fit Radian...

    I know for a fact that JBL 4" dias fit Radian 950.
    I have tried it myself with the d8r2450 and and d8r2452.
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    Thanks, guys.

    Thanks, guys.
  17. Replies
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    Wow - truly an excellent post! This common...

    Wow - truly an excellent post!
    This common overview on all the newer big-format drivers is really useful.

    It seems (to me) that the 2451 is the odd one out here - with a bolt pattern on a much...
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    Bolt circle / horn mounting holes diameter

    I know the old (2446 and before) drivers: they have 4 mounting screws on 101,6 mm bolt circle.

    But on the newer ones, the spec sheets are confusing.

    Do anyone know the bolt circle diameter for...
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    Found it! It's here:...

    Found it!
    It's here: http://www.audioheritage.org/vbulletin/showthread.php?13202-523x-cards&highlight=CCBREQ

    :cheers:
  20. Replies
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    2,713

    JBL/UREI 5235 card schematic

    Does anyone have the schematic for any of the JBL/UREI 5235 cards for the 2360 with HF compensation?

    The manual states thet these all have the required HF comp:
    51-5232-500 CCBREQ 18dB/500 Hz...
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    LE10A recone to 2123

    Can a LE10A be reconed with the C8R2123 cone kit?
    Or (if I ever find it): the C8R2122 kit?

    Cheers, Espen
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    Hi Mårten! The E130 has indeed a curvlinear...

    Hi Mårten!

    The E130 has indeed a curvlinear cone, like the 2220.
    I don't know about the K130 though, but would imagine they are similar.

    E130 has a pronounced resonance (up 10dB) at about...
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    This is very interesting. I am also...

    This is very interesting.
    I am also contemplating a midbass horn.
    How do you make the horn and phaseplug?
  24. Replies
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    Excellent. After some searching, I found data on...

    Excellent. After some searching, I found data on gap depth in this old post: http://www.audioheritage.org/vbulletin/showthread.php?624-Gaps-and-Depths&p=4549&viewfull=1#post4549

    Then, according...
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    E145 air gap / voice coil dimensions

    Do anyone know the depth of the air gap and the height of the voice coil winding in the E145 driver?
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