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Thread: Should I buy a pair of JBL 4343?

  1. #46
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    For the benefit of new members to the JBL 4343 - 4344 - 4345 space l have posted descent images of JBL drivers with original cones, reconed driver, refoamed surrounds of a reconed driver and compression driver diaphragms. I don’t have JBL 2121H here at the moment but will post an image one at a later stage. I will see if l can post impedance curves of the woofers.

    The refoamed drivers were done by a business called Speaker Bits. I don’t recall the circumstances as it was a long time ago.

    I will ask Edgewound if he wishes to comment on the work and what 43xx buyers should look for before and after purchase.


    Image of refoamed 2231A driver with a JBL 2235H recone kit by local loudspeaker repair specialist.
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  2. #47
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    Image of re-coned 2245H. I have several 2245H drivers.

    The second 2245H does not have any Jbl markings on the rear of the cone but the glue on the rear of the cone at the surround is identical. There is a glue drip on the edge of the frame. Unfortunately l don’t recall the circumstances as the work was done 7 years ago. (Possibly re foaming)

    Perhaps Edgwound can comment
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  3. #48
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    Image of JBL 2122H recone by local JBL Agent
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  4. #49
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    Image of original JBL 2123H driver
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  5. #50
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    Image of JBL D8R2425 diaphragm

    This particular diaphragm is acquaplas dusted.
    Quality of construction superior to other aftermarket diaphragm posted.
    Superb performance in an Alnico 2420 driver.
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  6. #51
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    Image of aftermarket replacement for the D16R2420 (Speaker Exchange)

    The dings were due to problems during installation. The guide holes were too big to be of any use. The overall construction is inferior to a JBL diaphragm.
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  7. #52
    Administrator Robh3606's Avatar
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    A new and improved foam replacement method! Sorry couldn't resist will delete

    Rob
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    "I could be arguing in my spare time"

  8. #53
    Senior Member ivica's Avatar
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    Quote Originally Posted by Robh3606 View Post
    A new and improved foam replacement method! Sorry couldn't resist will delete

    Rob
    HI Rob,

    Seems to me one of the best way to destroy such nice drivrs.
    Regards
    Ivica

  9. #54
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    Some D&M posts in the subject of refoaming, reconing and JBL Authorised Service Centres.

    It’s all been said before.

    http://www.audioheritage.org/vbullet...-(L100T)/page3

    http://www.audioheritage.org/vbullet...option-for-DIY

  10. #55
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    Quote Originally Posted by Robh3606 View Post
    A new and improved foam replacement method! Sorry couldn't resist will delete

    Rob
    Is that genuine JBL shaving foam?

  11. #56
    Senior Member martin2395's Avatar
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    Quote Originally Posted by cooky1257 View Post
    Is that genuine JBL shaving foam?
    Must be the newest Foamaloy(C) suspension
    €2k was a laughable price (as in - very, very low for EU) but both the woofers and mids look bad. I'd smack them right out and replace with 2235H and 2123H anyway. The 2123 doesn't sound obviously bad with the 3143 networks. I'd rather have a pair of good 2123H's than those 2121's and 223x-something with what looks like aftermarket cones.

  12. #57

  13. #58
    Senior Member RMC's Avatar
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    RE post # 52:

    Thanks for that one, had a good laugh (great imagination). Btw the fellow was definitely more conscientious (a nice quality for refoams) on the left one than on right. Sorry and delete? isn't it fun? Relevant on what NOT to do unless scrapping. The other's "reserved space pictures" can't match this fun for sure.

    EDIT: In post #30 Don even mentioned "The real tough ones have already been "repaired" with anything from silicone to electric tape." In the ditch, I guess all is fair when the show must go on, or on low value or beaten drivers to try to get some extra notes out of them.Though he hasn't specified in what context these were used. For sure shaving cream won't help much...

  14. #59
    Senior Member RMC's Avatar
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    RE: the latest "prose" from my most faithful follower requires a reply.

    Looking at the show he tried to put on, only confirms the posts hit the right issues, getting him going...

    "Everyone please use the ignore button...", please, but not him! LOL and not on his own blurting! Amusing. Volontarily forgets where is own "ignore button" is to take the floor not wanting others see some other side of the coin... But he will keep checking for sure, day in day out!

    "We've heard some opinions." Remember, other's are only opinions, HE is the one owning the facts.

    Santon Audio? Already know them, am in contact with them. Has he tried them? Or just a CDN Net search name to appear relevant? He may be out of luck because I did try them, Aug. 12, as a matter of fact (or opinion?) enquiring about a specific driver's refoam kits (foam & rubber) on their site, giving them info on driver/foam dimensions. The reply came 4 days later- time to check? (without the numerous numbers not in dispute, e.g. price, tax, shippping, dimensions):

    "Hey Richard, So based on your numbers it looks like the xxxx should work ... If you wanted to try a butyl rubber surround, the closest we have is xxxx, so it may be a bit tight?) ... Let me know if you want to move forward, I believe we would have to order the foams in ... we place a parts order roughly once every other week." Underlines reflect uncertainty, had expected a little more. I'll assume they haven't done yet such a woofer, may not really know about fit, should say so? That way, I'd be the "guinea pig" assuming the trial/error/$ risk, plus not in stock/needs to be ordered. Delay? Tried to encourage some Canadians but he seems so uncertain, then there's other places where it looks more promising.

    Seems pretty evident his list of abuse, improper use, etc. volontarily omits his large number of these, plus insults, name calling, digressions and the rest. Yep!

    RE Fabaudio: "Mass and compliance are very important. We pay close attention to these details when restoring a speaker." I've clearly indicated myself in a previous post here not wanting to add more cone mass than necessary when refoaming. Suddenly mass is quoted has being important! I guess "ones own poor experience" isn't that poor after all, isn't it. Do they actually measure compliance/how? Remains to be seen (e.g. Bullock P.24).

    "pure Evil..."? One could only learn that from him, the master, can't get that anywhere else.

    "... repair centres in Canada but none of them seem like a business that will knowingly do the wrong thing..." He knows very well that knowingly do it wrong isn't the issue at all, just playing his little smarty game, and probably never used a speaker repair shop in Canada.

    He keeps arguing it desperately anyway possible (# 45), and hours later adds "It’s all been said before." naming older threads (# 54), BOTH OF THESE POSTS ON THE SAME DAY!

    So, same old noise as usual when finding he painted himself in the corner. Nothing new.

    Would have been so easy to admit from the start something was (or even might have been!) missing and case closed. Doesn't want to assume, correct and move on. He prefers to play in the mud... Fine then.

    BTW The driver pictures posted seem representative sample in that they show the varying quality levels of work one can expect with repairs: what seen, from real nice to less so (eg 2245 dustcap). Same reality as the driver restoration business generally, even Down Under. Though trying, can't always hit homeruns. Tough.

  15. #60
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    Richard

    Before you get too ahead of your self cool your jets and carefully read this link.

    http://www.audioheritage.org/vbullet...l=1#post416888

    Thank you for the confirming your understanding

    Be polite and shut up if you can’t.

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