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  1. #1
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    looking for

    Hello, I am looking for screws for the compression of my jbl 4343 (2420).
    It is not the same standard in France.
    Can somebody tell me which type of screw it acts? (information to be given to the store which is not near from my home)



    jacques

  2. #2
    Member ayaboh's Avatar
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    1/4" UNC. Don't remember the length.

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    Senior Member Fangio's Avatar
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    Quote Originally Posted by ayaboh View Post
    1/4" UNC. Don't remember the length.
    Yep. Length is 1" that would be ~ 25mm.

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    Quote Originally Posted by Fangio View Post
    Yep. Length is 1" that would be ~ 25mm.
    ok 1/4 UNC and 1"" length

    thanks a lot Ayaboh and fangio

    I changed myself the drivers of compressions (the old in aluminium and the new in titane)
    the screws were so tight that I have to use a drilling machine to make jump the head of the screws (very carrefully)
    but I forgot that the standard of the screws was different (damned )
    now I can phone to a shop in paris where it's possible to find screws like this



    jacques

  5. #5
    Senior Member Fangio's Avatar
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    Well it's an ancient standard but psssst.. don't tell that to the anglo-saxon majority here.

    May I ask - why did you choose titan diaphrams as replacement?

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    Quote Originally Posted by Fangio View Post
    Well it's an ancient standard but psssst.. don't tell that to the anglo-saxon majority here.

    May I ask - why did you choose titan diaphrams as replacement?

    my living room is very reverberating
    seriously besides I plan to pose an acoustic treatment on the wall of the bottom and the ceiling
    I find that the high frequencies are a little too important and hard
    one of my friend, with 4345 , has change the aluminium diaphrams for titane diaphrams and the sound is softer (not so straight like aluminiun)

    so, as I found originals' jbl diaphrams in titane (and not very expensive !) I wanted to test them

    but I forgot the screws (I am a french jbl newbies :-) )

  7. #7
    Senior Member edgewound's Avatar
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    Quote Originally Posted by jacques View Post
    ok 1/4 UNC and 1"" length

    thanks a lot Ayaboh and fangio

    I changed myself the drivers of compressions (the old in aluminium and the new in titane)
    the screws were so tight that I have to use a drilling machine to make jump the head of the screws (very carrefully)
    but I forgot that the standard of the screws was different (damned )
    now I can phone to a shop in paris where it's possible to find screws like this



    jacques
    It seems to me that you're interested in the diaphragm mounting screw size, which is #6-32 x 5/8".

    The horn mounting screws are 1/4-20
    Edgewound...JBL Pro Authorized...since 1988
    Upland Loudspeaker Service, Upland, CA

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    Senior Member Bruno GINARD's Avatar
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    Bruno

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    Quote Originally Posted by edgewound View Post
    It seems to me that you're interested in the diaphragm mounting screw size, which is #6-32 x 5/8".

    The horn mounting screws are 1/4-20
    hello,
    before to change the diaphragm, your are oblige to separate the 2420 in two parts
    I speak about the four screws which maintains these two parts

    sorry but my english is not my first language and I am not very clear

    jacques

  10. #10
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    Quote Originally Posted by Bruno GINARD View Post
    hello bruno

    there is not persistence of the session on the radiospare web site

    so the link is dead at the end of YOUR session

    can you give me the reference of radiospare's screw ?

    jacques

  11. #11
    Administrator Mr. Widget's Avatar
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    Quote Originally Posted by jacques View Post
    hello,
    before to change the diaphragm, your are oblige to separate the 2420 in two parts
    I speak about the four screws which maintains these two parts

    sorry but my english is not my first language and I am not very clear

    jacques
    Your English is fine... it i just a bit confusing because these drivers have three sets of screws. The 1/4-20 screws as Edge mentioned for mounting the horns, the non-magnetic #6-32s for the diaphragms and the four square shouldered rather long ~2" (50mm) machine screws that you need to mount the back cap onto the front half of the driver.

    Unfortunately I do not know the name for this type of screw or the size of these off the top of my head. They are a standard machine screw, but are not a particularly common style. I have always ordered them directly from JBL. This is not a realistic option for you. Maybe Guido or another European member has a source for them.


    Widget

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    Quote Originally Posted by Mr. Widget View Post
    Your English is fine... it i just a bit confusing because these drivers have three sets of screws. The 1/4-20 screws as Edge mentioned for mounting the horns, the non-magnetic #6-32s for the diaphragms and the four square shouldered rather long ~2" (50mm) machine screws that you need to mount the back cap onto the front half of the driver.

    Unfortunately I do not know the name for this type of screw or the size of these off the top of my head. They are a standard machine screw, but are not a particularly common style. I have always ordered them directly from JBL. This is not a realistic option for you. Maybe Guido or another European member has a source for them.


    Widget
    yes, that's right (not about my english :-) )
    I am looking for the four square shouldered rather long ~2" (50mm) machine screws that I need to mount the back cap onto the front half of the driver.

  13. #13
    Senior Member rs237's Avatar
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    i have the same Problem, i found these f*****g screws in my 2441.

    regards Juergen
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  14. #14
    Senior Member spirou38's Avatar
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    Quote Originally Posted by jacques View Post
    hello,
    before to change the diaphragm, your are oblige to separate the 2420 in two parts
    I speak about the four screws which maintains these two parts

    sorry but my english is not my first language and I am not very clear

    jacques
    Hi Jacques,

    You should try Weber métaux in Paris - France

    http://www.weber-france.com/Adresse.htm

    Bonjour de Grenoble.
    Spirou38

  15. #15
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    Quote Originally Posted by spirou38 View Post
    Hi Jacques,

    You should try Weber métaux in Paris - France

    http://www.weber-france.com/Adresse.htm

    Bonjour de Grenoble.
    hello,
    yes I Know, the shop in paris is weber metaux

    but I live in Bordeaux and I don't know the screw's type, that is my problem !

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