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Thread: The JBL 4345 Club

  1. #76
    Senior Member Ian Mackenzie's Avatar
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    Quote Originally Posted by Zilch
    From the red dots, both are D16R2425.

    Bottom one has homebrew Aquaplas coating; factory don't coat the diamond surround, as I recall.

    [Not that it's a bad idea, tho, of course.... ]
    Congratulations Zilch, you are the winner of the quiz!

    I will contact Lord Zilchmeister early next week with details of the mystery prize.

    Ian

  2. #77
    RIP 2011 Zilch's Avatar
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    Quote Originally Posted by Ducatista47
    I thought they were D16R2421's, without and with aquaplas.
    Yeah, the titanium has a more "gunmetal grey" color to it (top in pic,) whereas aluminum looks more, well, ummm, "aluminum."

    Quote Originally Posted by Ian Mackenzie
    I will contact Lord Zilchmeister early next week with details of the mystery prize.

  3. #78
    Senior Member Ducatista47's Avatar
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    Experiment

    I just got some mp3's, Nero'd them up to wav files, equalized the volume with Nero's nifty tool and burned them to a disc for my wife's car cd. I previewed the cd on the 4345's.

    I had suspected all along the big dogs would improve even the crappiest source material, and let me tell you it doesn't sound bad. The body is amazing, considering the source.

    Moral of the story, if you want your tune collection to sound better, amps and electronics are part of the answer, but don't count out the 4345. Build or buy!

    Clark
    Information is not Knowledge; Knowledge is not Wisdom
    Too many audiophiles listen with their eyes instead of their ears


  4. #79
    Senior Member Ian Mackenzie's Avatar
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    Well we were all having Fun here.

    I like to keep people curious and interested when it comes for caring for and revitalising their JBL's.

    Aquaplas is nothing new on the forums, nor is Charge-Coupling.

    JBL have been using both for years. Certain aquaplas diaphragms can ordered from JBL. Details are all over the forums about Charge-Coupling.

    I don't see anything exclusive about any of this stuff. If you can't improve an aging 30 year old system with published more recent ideas then you may as well buy current SOA stuff from them with all those new ideas anyway or start looking at the competition.

    Every member who has heard or tried acquaplas treated diaphragms has either posted about or has it every reason to post about it. Both these technologies are a significant improvement.

    About the above post. I have never read nor seen the above paragraph but now that you have posted it its public knowledge.

  5. #80
    Senior Member Ian Mackenzie's Avatar
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    I will post some other amusing improvements shortly.

    Here is another quiz but its a trick question this time.

    Who's 4345's are these? Are they the same speaker?
    There will another prize for the first correct answer.

    One post only per poster.
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  6. #81
    Senior Member Ian Mackenzie's Avatar
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    This is one of my 4345 clones.

    I should point out that initially I was given the wrong JBL Blue paint by a certain member but they sure sounded great. They have since been re painted. How dare he!

    One of my little to do jobs will be to re finish them with the exact baffle color match and make up some grill covers next week when I have some time off. I want laos to get some foilcals made-up and some nameplates.

    Heck I may even make new enclosures one day..I have decided to make a 4345 Centre Channel. I have not quite worked it out yet but three 18 inch 2245 in one room is a very serious concept
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  7. #82
    Senior Member JuniorJBL's Avatar
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    Quote Originally Posted by Ian Mackenzie
    I will post some other amusing improvements shortly.

    Here is another quiz but its a trick question this time.

    Who's 4345's are these? Are they the same speaker?
    There will another prize for the first correct answer.

    One post only per poster.
    It would appear that these were once owned by Ken And now are in Bo's front room!!
    Always fun learning more.......

  8. #83
    Senior Member Ian Mackenzie's Avatar
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    Quote Originally Posted by JuniorJBL
    It would appear that these were once owned by Ken And now are in Bo's front room!!
    Sorry, not 100% correct (I said it was a trick question..a clue..read Bo's posts on his ownership of these ).

  9. #84
    RIP 2011 Zilch's Avatar
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    C'mon folks. Don't let me win again!!

    Not being a 43xx "Club" member, I'm justa carpetbagger in this thread....

  10. #85
    Senior Member Ian Mackenzie's Avatar
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    Quote Originally Posted by Zilch
    C'mon folks. Don't let me win again!!

    Not being a 43xx "Club" member, I'm justa carpetbagger in this thread....
    Oh come on guys ....

    You may as well Zlch....I have not mailed the other prize yet!

  11. #86
    Senior Member Ian Mackenzie's Avatar
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    Regards that other little noise I'll just ignore it.

  12. #87
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    I'll guess Bo's and they are technically not the same speaker.

  13. #88
    Senior Member Ian Mackenzie's Avatar
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    Time for another hint.

    Bo did a special thread about a _ _ _ _ _ _ of a cone.

    He also performed other maintenance.

  14. #89
    Tom Loizeaux
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    To Greg Timbers

    [QUOTE=gtimbers]"I can't belive all the interest in this 30 year old system."

    Greg, Thanks gain for your post on the 4345.

    Though the 4345 is popular with some members here, and the 4344 is the latest version (US) of the 434X series, the 4343 seems to be the most prevalent version of these great 434X series studio monitors. Since so many of us are using, restoring and refining 4343s, I wonder if you would comment on this 43 series in terms of how they differ sonically from the character and nuances of the 4345s you commented on earlier.
    Specifically:
    Are the 15" woofers better suited to the 10s and how do the 2231, 2231H and 2235Hs compare in this monitor. (Bi-amping a given)
    Can you comment on the 2121 verses the 2122H in this application and how the inverted dust cap contributes.
    And finally, which compression driver/ diaphragm fits into this 4-way configuration best?

    There has been a great deal of interest and discussion on these points, and much good information expressed, but your comments are highly valued, for obvious reasons, and would make a great contribution to this Forum.

    Thanks again for all your efforts!

    Tom

    P.S. I love my 4343s

  15. #90
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    Quote Originally Posted by Tom Loizeaux
    make a great contribution to this Forum.
    One last time:

    Stock 4343
    1. Bi-amp and build a biased bi-amp only 3143 filter
    2. Aquaplas the 2420 diaphragm

    Upgrade to 4344
    1. 2231 => C8R2235
    2. 2121 => C8R2122
    3. 2420 => aquaplased D16R2421 or D16R2425 diaphragm
    4. Bi-amp and build a biased bi-amp only 3144/3145 filter

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