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Thread: Building a 4343 Clone

  1. #31
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    Thanks for the clarification Ian!
    that makes sense! - i don’t think i’ll ever flip the upper baffle board, but i’ll consider using plywood here

  2. #32
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    I thought the Japanese members thread had authenticity

  3. #33
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    I absolutely agree - I've been at that thread before - great work, and great pictures!

    Again, thanks for the clarification, not easy when documents doesn't correspond to reality!
    To muddy the waters even more, my doubt was cause because I know JBL have had the local import agencies in some countries make their own enclosures by JBL America specification. That was the case for example in Denmark for the Lancer series speakers - almost all enclosures were built locally in Denmark, because import prices were cheaper and easier on drivers alone.
    That, and all the great cloning work being done in these threads made me uncertain what was "real"

  4. #34
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    If you read closely on the previous mentioned thread the restorer was the 3rd owner as far as we know

    The original purchaser is anyone’s guess

    Once the original owner passes on the stock box over say EBay the odd of an authentic system plummet like a rock.

    Things get taken out, modifications get made, restorations may not adhere to the original.

    I have pics of a crossover that was butchered then returned attempted to stock and on sold as stock.

    What you don’t see you don’t know until you really open up everything or a problem arises.

    In another case a member bought all the drivers for a 4344 project off eBay.

    It was his dream.

    Every driver had a problem! I had to mitigate 4 times back to each driver after l built the crossovers because it apparently did not sound right and did not test right on location ( the other side of the world)

    Don’t assume anything is good until you know it’s good.

    Particularly off EBay.

    Not wanting to scare you but get your drivers checked out by a qualified service agent before anything else.

    Unfortunately this is the nature of loudspeakers recycling through EBay where what a seller doesn’t know he doesn’t know. People make adhoc changes then try and make it like it was and move on.

    So you have to validate and break that cycle.

    I’m not reading the riot act here.

    Just be cautious and validate as you are doing.

  5. #35
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    A little update: like christmas

    Today is the last day before easter-holiday and I was lucky that all my incoming packages arrived hours before I was to leave for my parents house.
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    So 2X 2122H recone kits directly from JBL, 2X 3145 Crossovers and 4x 15" woofers, 2x 2231A with 2235 recone kits, and a pair of 136A's as well.

  6. #36
    Senior Member berga12's Avatar
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    Lucky man!!! how you can find stock crossover!?!

  7. #37
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    It was on Ebay, in the Netherlands. Ian pointed me towards them, and then it was just clicking buy now

  8. #38
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    Quote Originally Posted by santashooter View Post

    Bought:
    Pair of C8R2122H recone kits
    Where did you buy these?

  9. #39
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    I know a guy
    these are from the Internal Harman Kardon Netherlands System - so a European service partner should be able to get them

  10. #40
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    Thanks a lot

  11. #41
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    Quote Originally Posted by santashooter View Post
    It was on Ebay, in the Netherlands. Ian pointed me towards them, and then it was just clicking buy now
    I Googled JBL 3145 to find the old JBL schematic and the EBay listing came up.

    I could not believe it!

    It was like it was meant to be.

  12. #42
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    I am a very happy guy - CAD drawings for the enclosures are in the works now. Along with allocating time for the build process. I can’t help but think I am underestimating the scope in ny head.

  13. #43
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    A quick question regarding ordering L-Pads.
    Can someone please verify for me the types I need:
    the UHF should be 50W and the 2 others 100W models - the 50W should be 8 ohms and the 100W 16 ohms?
    I am using the stock 3145 crossover, and running the 2122H as the lower mid driver.

  14. #44
    Senior Member Odd's Avatar
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    16 ohm with long shaft is difficult.
    I bought these;
    ebay
    They are of good quality.
    50W or 100W does not matter for home use.
    43XX (2235-2123-2450-2405-CC 3155)5235-4412-4406-4401-L250-18Ti-L40-S109 Aquarius lV-C38 (030) 305P MkII

  15. #45
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    50 Watt 8 ohms

    Also check the shaft length

    I don’t think 100 Watt will fit due to spacing
    Check Parts Express

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