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Thread: 4430 drivers?

  1. #16
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    Originally posted by Figge
    how about D8R2425 availability in the future?
    do i have to stock up? or will they be available when i need them?
    I wouldn't fret about them for now. Of course the price is probably only going to go up.

  2. #17
    Super Moderator Hofmannhp's Avatar
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    Re: 4430 drivers?

    Originally posted by Giskard (edited by HP)
    ..... Usually they dislike the mass ring simply because it tends to smack on the pole piece when driven excessively. I always thought the mass ring was sufficiently high up on the former that it wouldn't be an issue but measuring one right now I see it is only 0.018" above the coil. If they were a huge problem though I would think JBL would skip using them in the latest systems such as the S2K-1000.
    Hi Giskard,

    I think you talk about the mechanical limits.....I talked about the electric/magnetic limits. I try to explain it in my words....the pole piece induction rings have to be compared with a shock absorber in your car. The ring has to shorten the reinduction of the cone (with heavy mass), in your car the motion of the wheel base.
    It's right to say....the 2235 is one of the best drivers for low freq use....also in cause of his very low fres. But I think a low fres is not all to look for. I.e. it's easy to push a driver down to 10Hz fres with more mass.....but as it is with compromises.....the pulse delay and efficiency may be negative influenced.

    Just my opinion......

    HP
    Last edited by Hofmannhp; 06-27-2004 at 08:50 AM.
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  3. #18
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    Re: Re: 4430 drivers?

    Originally posted by Hofmannhp
    Just my opinion......

    HP
    No you're right. Various drivers are designed for various applications and compromises are required. The 1500SUB is designed for significantly lower frequency response than even the venerable 2235H. It has double the moving mass of the 2235H. It is entirely unsuitable for response extending up into the triple digits. That doesn't mean it won't try, but something like a 2234H would spank it bad up in that frequency range.

    I think at the time JBL definitely chose the best LF driver for the 4430. Sure, I'd have preferred to somehow make the LE14H work instead but it lacks a bit of efficiency for the specific task at hand.

    Currently I am reworking my 4430's to use the 2234H instead of the 2235H and will leave the lowest stuff to the 1500SUBs. I've been told the original 4435 prototype used dual 2235H's but the preponderance of bass caused the engineers to rethink using the mass rings, hence the 2234H was born. Good solution.
    Last edited by 4313B; 06-27-2004 at 10:37 AM.

  4. #19
    Super Moderator Hofmannhp's Avatar
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    Re: Re: 4430 drivers?

    Originally posted by Hofmannhp
    Hi Giskard,
    ....... But I think a low fres is not all to look for. I.e. it's easy to push a driver down to 10Hz fres with more mass.....but as it is with compromises.....the pulse delay and efficiency may be negative influenced.
    HP
    I cannot be right 100%.......cause I'm very happy with the sound of my " heavy" 2234.

    HP
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  5. #20
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    4406, 4313B and 4430 SN

    Hello,
    i'm new on this site and i don't speak well english, sorry.


    I have 3 JBL models :
    - JBL 4406 : SN J1104-101080 and J1104-101081
    - JBL 4313B : SN 23177 and 23184
    - JBL 4430 : SN 281698 and 301021


    I bought the 4430 speakers a few days ago and i believe they were bought initialy in march 1988 in France.


    Can you help me to know :
    - for 4406 : what is the production's year
    - for 4313B : what is the production's year
    - for 4430 : what is the production's year (i think 87 or 88) and what kind of drivers are inside.


    Any other information is welcome.
    Thanks in advance, bye.

    Guillaume
    There is nothing either good or bad but thinking makes it so. William Shakespeare

  6. #21
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    I can't believe that this thread is really dead ?
    There is nothing either good or bad but thinking makes it so. William Shakespeare

  7. #22
    Senior Member BMWCCA's Avatar
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    Quote Originally Posted by Mikool35 View Post
    Can you help me to know :
    - for 4406 : what is the production's year
    - for 4313B : what is the production's year
    - for 4430 : what is the production's year (i think 87 or 88) and what kind of drivers are inside.
    I don't believe a data base exists to answer your questions about year of production. My understanding is that the purpose of the serial number thread is to fill in the blanks with data from original purchasers and original receipts. I could be wrong but I've never seen a direct correlation between serial numbers and production dates in a form to use as reference.

    This may help answer one of your questions (from the 1982 Pro catalog):

    ". . . as you have no doubt noticed, no one told the 4345 that it can't work correctly so it does anyway."—Greg Timbers

  8. #23
    Senior Member turnitdown's Avatar
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    I have had several drivers and systems identified as to year of origin in the database. Register your numbers and you will, eventually, get an answer.

    4430s rock, js

  9. #24
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    Turnitdown and BMWCCA, thank you.

    I'm particularly interested by 4430 model that i listen every day.
    I know that they were bought in march 1988 in France. So, i believe that they were built in 1987 or 1988.
    About 4430 compression drivers, here's what i discovered :
    2421A : from 1981, Alnico, Aluminium diaphragm, 8 ohms, 15000 gauss (A = 8 ohms, B = 16 ohms)
    2425H : from 1982, Ferrite, Titanium diaphragm, 8 ohms, 17000 gauss (H = 8 ohms, J = 16 ohms)
    2426H : from 1992, Ferrite, Titanium diaphragm, 8 ohms, 18000 gauss (H = 8 ohms, J = 16 ohms)

    Thank you again for your help and so much the worse for the database
    There is nothing either good or bad but thinking makes it so. William Shakespeare

  10. #25
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    Here's my serial numbers for my 3 JBL models :
    - JBL 4406 enclosures : SN J1104-101080 and J1104-101081
    - JBL 4313B enclosures : SN 23177 and 23184
    - JBL 4430 enclosures : SN 281698 and 301021

    I never opened them so i don't know the serial number of the drivers inside.

    Thank you once again.
    There is nothing either good or bad but thinking makes it so. William Shakespeare

  11. #26
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    For JBL 4430 compression diaphragm replacement (D8R2425), i found 3 possibilities :

    1) Radian 1225-8, may be the best quality/price ratio :
    https://www.thomann.de/fr/radian_12258.htm



    2) Radian 475PB, an expensive option :
    https://www.behringer-electric.de/tr...5pb-beryllium/



    3) JBL D8R2425, the original JBL diaphragm :
    https://reconingspeakers.com/product...425-diaphragm/


    Any advice or review is welcome.
    NB : i already read the zonker92 review on Parts Express.
    There is nothing either good or bad but thinking makes it so. William Shakespeare

  12. #27
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    Hi,

    pardon me for jumping in . Are there any schematics available for the 61449P xover network that was built into the late 4430's with 2426H's? And which xover was used in combination with the 2425H's?

    Best regards!

  13. #28
    Senior Member turnitdown's Avatar
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    Search for 4430 crossover schematic ot JBL 3134 network schematic. They're out there. If you can't find a good example, send me a PM. I built two pair for DIY projects involving 4430 parts and an LE14H version (obviously a different LP filter)

  14. #29
    Senior Member Odd's Avatar
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    4430 with 2426

    4430LR.pdf
    43XX (2235-2123-2450-2405-CC 3155)5235-4412-4406-4401-L250-18Ti-L40-S109 Aquarius lV-C38 (030) 305P MkII

  15. #30
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    Yes, thanks, I know this N3134 schematics. My question was about possible modifications in the networks when JBL moved to 2425H's and finally 2426H's. At least the xover for the latter version carried a different part #. And both drivers are of different sensitivity, compared to the original 2421A's.

    Best regards!

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