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Thread: D120F Copper Dust Cap?

  1. #1
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    D120F Copper Dust Cap?

    Any of you ever seen copper dust caps on JBL's before? Did JBL use them from the factory? The cone # is 21032.





  2. #2
    Maron Horonzakz
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    That might not be a JBL cone job,,the outer surround looks awfully big.

  3. #3
    Senior Member Doc Mark's Avatar
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    Hey, Maron,

    That's what I was thinking, too. Take care, and God Bless!

    Every Good Wish,
    Doc
    The only thing that can never be taken away from you, is your honor. Cherish it, in yourself, and in others.

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    Yes I have. That is not actually copper but copper colored. Those are most likely late 60,s vintage.

    That cone looks to be real JBL to me as well.

  5. #5
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    Quote Originally Posted by Maron Horonzakz View Post
    That might not be a JBL cone job,,the outer surround looks awfully big.
    The cone is paper all the way up to the surround. There is a wide coating over the surround and onto a good portion of the paper cone. Probably why it's still connected today.

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    Quote Originally Posted by John View Post
    Yes I have. That is not actually copper but copper colored. Those are most likely late 60,s vintage.

    That cone looks to be real JBL to me as well.
    Thank you. I thought the serial #31999 would show up better in the picture than it did. Any idea as to the reason why they used that color dust cover instead of the silver color?

  7. #7
    Senior Member Don C's Avatar
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    This was discussed once before, it might be something that JBL did for Fender. The cone and edge doping look like original JBL style to me.
    http://www.audioheritage.org/vbullet...ad.php?t=19772

  8. #8
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    Quote Originally Posted by 2guests View Post
    Thank you. I thought the serial #31999 would show up better in the picture than it did. Any idea as to the reason why they used that color dust cover instead of the silver color?

    The silver color you refer too is the natural color of the dome. I think the coating that imparts a copper color to the dome is meant to tone down the high freq. from the driver.

  9. #9
    Maron Horonzakz
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    Nope color will not tone down any high frequencies,, Fender baskets were painted orange,,Purple baskets were painted for Heil.

  10. #10
    Heather [Senorita member] hjames's Avatar
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    Quote Originally Posted by Maron Horonzakz View Post
    Nope color will not tone down any high frequencies,, Fender baskets were painted orange,,Purple baskets were painted for Heil.
    Look at the pictures - the baskets aren't painted copper - the pix show a copper Dust cap.

    Perhaps it's a coloured Aquaplas like material?

    2ch: Oppo, Acurus RL-11, JBL 240ti, Heath AS101, Carver TFM-25,Von Schweikert VR4
    7: Oppo BDP103D, B&K, UREI 809A, JBL B460,

  11. #11
    Senior Member BMWCCA's Avatar
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    Where's Harvey when we need him??

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

  12. #12
    Maron Horonzakz
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    HJAMES,,,I know that,,, I,m stating that if you buy quantities of JBL products you can command any color. Fender,Orange,,,Heil Purple,,baskets,,,,,, No name, copper dome

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    Quote Originally Posted by BMWCCA View Post
    Where's Harvey when we need him??

    Texas, most likely.
    Yup, just got back from the NY AES show where I debuted a new near field monitor system I designed.

    As to the orange color dust cap, I haven't a clue; we certainly didn't do it while I worked there. Tony Lowe would probably know about this.

  14. #14
    Senior Member BMWCCA's Avatar
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    Quote Originally Posted by Harvey Gerst View Post
    Yup, just got back from the NY AES show where I debuted a new near field monitor system I designed.
    Need more details!
    ". . . as you have no doubt noticed, no one told the 4345 that it can't work correctly so it does anyway."—Greg Timbers

  15. #15
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    Quote Originally Posted by BMWCCA View Post
    Need more details!
    Here's the pdf and some links to discussions about them:

    http://www.gearslutz.com/board/new-p...-monitors.html
    and
    http://www.gearslutz.com/board/so-mu...-monitors.html

    Finally, this message from Mix Magazine:

    "Subject: Trident HG3 Monitors selected as AES Hit!
    Mix has been reporting on major audio/music tradeshows for more
    than 30 years, and we like to acknowledge some of the more innovative
    products we’ve found at these events. This year, Trident’s HG3 monitors
    were selected by the editors of Mix as one of the Top-20 hits of
    AES 2009, as reported online and in the November 2009 issue.

    http://mixonline.com/news/mix_certified_hits_2310/

    Congratulations on creating a hit product. We look forward to discovering
    more of these from you in the months and years to come. Keep ’em coming!
    --george
    George Petersen
    Executive Editor
    Mix Magazine"
    And Scott Dorsey had this to say:
    "BEST SOUND IN SHOW
    ------------------
    Trident Audio Developments was showing off a pair of small nearfield
    monitor speakers called the HG3, and they actually sounded good. It
    wasn't prone to any of the painfully obvious issues that most small
    monitor designs are. Now, I've only heard them under show floor
    conditions and not in a proper room, but they definitely show enough
    promise that I am going to go out and give them a listen."
    Attached Images Attached Images

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