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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.

  3. #3
    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.

  4. #4
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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?

  6. #6
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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

  8. #8
    Bruno GINARD
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  9. #9
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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

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