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Thread: 2308 Lens

  1. #76
    Senior Member Fangio's Avatar
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    +1

    Quote Originally Posted by Mr. Widget View Post
    Today I received my pair. The level of professionalism is outstanding. The packaging, the manufacturing, even the label with serial number... very impressive.

    I do not have a pair of originals for comparison, but I am confident that when installed no one would ever mind that they were not made by JBL. I am certain that they will be identical sonically, and visually they are very nice. My only criticism is that the mold flow lines in the injection molding process are visible... probably something that most wouldn't even notice.

    ...

    I'd recommend these to anyone with a broken or cracked L91 or 2308 lens.

    Widget
    Got a pair out of Kenji's second batch of these lenses, currently available again.

    So far I have had four pairs of originals in more or less used condition for comparison, have kept two intact pairs. I would consider myself picky, and it's quite possible more JBL speakers in need of undamaged lenses will come by in future.

    Anyway, these Kenrick lenses are as good as it gets now and look brandnew of course. I personally won't bother about looking for „mint” originals anymore, I'd just order another pair from him and be done. Handling and shipping to Europe was professional as well.

    Highly recommended.

  2. #77
    Senior Member macaroonie's Avatar
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    Xlnt

    In this day and age it is great to hear of a transaction without disappointment.

  3. #78
    Senior Member brad347's Avatar
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    Just bumping this thread to ask a question--

    To those who ordered lenses from Kenrick via eBay, how long was it before you received any kind of notice or communication re: "order received" or "shipping information" etc.?

  4. #79
    Senior Member grumpy's Avatar
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    I didn't expect them right away, so I wasn't worried about it.
    They just showed up without notice, IIRC.

  5. #80
    Senior Member brad347's Avatar
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    Quote Originally Posted by grumpy View Post
    They just showed up without notice, IIRC.
    Cool-- that's what I wanted to know!

    Thanks.

  6. #81
    Senior Member ivica's Avatar
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    Quote Originally Posted by grumpy View Post
    While over at "toddalin's", Todd was kind enough to let me have a look at
    a stock lens. We took some measurements and a trace... thinking I might
    follow in JohnW's footsteps regarding a DIY lens. I couldn't leave well enough
    alone and fit a hyperbolic curve to the measurements (not everyone has a
    lens to trace). Pic attached, ignore the ellipse in the center. Have fun.

    -grumpy
    Thanking to Grumpy work and figure approximate hyperbola curve that can be fit can be written as:

    36*x*x - 64*y*y = 9

    so asymptote angle Q to x-axis is about 36.87 deg, or
    cosQ = 0.8
    sinQ= 0.6
    or tanQ = 3/4

  7. #82
    Senior Member ratitifb's Avatar
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    Quote Originally Posted by ivica View Post
    36*x*x - 64*y*y = 9

    so asymptote angle Q to x-axis is about 36.87 deg, or
    cosQ = 0.8
    sinQ= 0.6
    or tanQ = 3/4
    and what about ln(tanhQ) ?

  8. #83
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    Quote Originally Posted by mbd7 View Post
    Could these be retro-fitted on to a pair of 4343's? One of these lens is a little beat up but other seems alright from the pictures.

    http://cgi.ebay.com/McCauley-417-hor...QQcmdZViewItem
    I have those horn/lens fitted with 2420 JBL drivers(pair) They are made of steel ant they have endured lots of tours, still rockin'

  9. #84
    Senior Member ivica's Avatar
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    Quote Originally Posted by ratitifb View Post
    and what about ln(tanhQ) ?
    well, if You want to make yourself these data would be useful

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