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Thread: New cabinet for L200

  1. #31
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    L200

    Some progress made


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    Back plate of LX 16A X over can.
    I enlarged the holes for binding posts and pushed out the plug in the centre hole.
    Sent them for sandblast and a powdercoat ..

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    Put in new binding posts and 8 ohm L pad pot (both from Parts Express)

  2. #32
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    L200 - custom 3 way X over ( LX 16A and N8000)

    Made up these X overs
    Retained the original 2.4 mH Inductors and 5 ohm resistors
    All the rest new - all new inductors from Mundorf
    Caps from Mundorf mainly
    First X over built with pal BSL Lee, next one built with my 14 y o daughter

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  3. #33
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    L200

    Powered up.
    Am at the stage of waiting for my cabs, so i made this vid for my cabinet maker to pull out the finger and get on with the job!

    http://www.youtube.com/watch?v=rVoiWqsqr4M


    Actually there s a problem.
    One of my 'new' 2405 s is not supertweeting, so will have to sort that out.
    Everything else is good,

  4. #34
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    Its been a while,.... almost there
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  5. #35
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    L200

    Gosh its been a while.
    In summary the old L200 was converted to a 3 way by adding the 2405s and modifying the XOs (L16 +N8000)
    Resulting speakers have been used sparingly.
    They dont sound great i think because the LE15B s are such awful woofers.
    I am considering taking them towards the L300.
    The 2355H woofers are hard to come buy especially where I am .
    is there an alternative ? 2226H perhaps ? or can anyone suggest another brand of woofer.
    i was thinking of making up the Nelson Pass version of the L300 XO, or actively driving them.

  6. #36
    Administrator Mr. Widget's Avatar
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    I’ve been there numerous times over the decade. What seems like a good idea on paper doesn’t always work out that way in practice... I’m sure the back room at JBL and every other major manufacturer have examples of designs that didn’t quite pan out.

    I would suggest switching to the 2235H woofers and a new ground up crossover. Do you have enough cabinet depth for the 2312/H92 horns?

    Beautiful work by the way!


    Widget

  7. #37
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    Hi Mr Widget
    Thank you. This is what they look like .
    Deserve to sound better though.
    2235 s are extremely rare out here and would be v expensive too.
    I think trying to get hold of a pair of 2225 s and re coning em to 2235 s would work out expensive with all the shipping from the US, and besides i ve never reconed before .
    Apologies as this is a JBL Heritage forum but could i boldly ask for an alternative brand of woofer..

    Re the speakers, the XO is inside.
    I think its the H91 horns in the L200.

    Shahrin
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  8. #38
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    i have secured a pair of 2235H s on ePay.
    No other way i guess
    They are in California, picked up by a friend - not sure whan i will see em .

  9. #39
    Administrator Mr. Widget's Avatar
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    Congratulations, I hope they make it safely and soon.



    Widget

  10. #40
    Senior Member sonofagun's Avatar
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    Grille?

    A nice sculptured custom grille on that cabinet front would be a great finishing touch!
    40+ years of sacrifice...and for what???

  11. #41
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    L200 to L300

    My LE 85 s have the H91 horns
    I believe that on the L300 /4333 the H92 horn is used .
    I assume they differ in dimensions .
    In practical terms, can someone enlighten me on the difference.
    Thanks

  12. #42
    Administrator Mr. Widget's Avatar
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    Quote Originally Posted by highcut28 View Post
    My LE 85 s have the H91 horns
    I believe that on the L300 /4333 the H92 horn is used .
    I assume they differ in dimensions .
    In practical terms, can someone enlighten me on the difference.
    Thanks
    The H91 horn also called the 2307 when using the JBL Pro version, is considered a 1200 Hz horn and the H92 or 2312 is several inches longer and is considered an 800 Hz horn.

    Back in ‘60s when the H91 was first introduced, JBL crossed them over as low as 500 Hz, but this is no longer recommended.


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  13. #43
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    Quote Originally Posted by highcut28 View Post
    My LE 85 s have the H91 horns

    In practical terms, can someone enlighten me on the difference.
    Thanks
    3"

  14. #44
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    L200 to L300

    Thank you Mr Widget and Toddalin.
    in summary i will be using 2405, LE85 with H91 and 2235H drivers and will probably build the Nelson Pass's version ofthe XOName:  PassL300.jpg
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    Cabs were made following 4333 dimensions.
    Fingers crossed, should work ?

  15. #45
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    Horns for LE85

    I am going to go the full whack to convert this to L300/4333.
    I will need longer horns for the LE 85.
    The H 92 horns are not easy to get and are quite expensive.
    I am considering getting Smith horns / JBL 2397 cloned.
    Would really appreciate help with regard to the dimensions of the correct horn to get the frequency response down to 850 Hz.
    I have seen descriptions of some nice horns but the appropriate length of throat does not seem to have been addressed.
    I see some wooden horns applied directly or very close to the drivers, but perhaps they are trying to achieve H 91 type of length.
    Appreciate help here. Thank you.

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