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Thread: No Inductors in L88 Plus Xover?

  1. #1
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    No Inductors in L88 Plus Xover?

    Please pardon my limited knowledge of crossovers, but why are there no inductive coils in an L88 Plus (N88) crossover shematic?
    I think we're all Bozos on this bus...

  2. #2
    Senior Member LE15-Thumper's Avatar
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    Simplicity

    The woofer was probably ran full range, therefore, no xover components there at all.

    Mid and tweet used a cap in series to set low cut off point and were ran flat out to the top of the spectrum.

    I haven't seen an L88 schem in a while, so I am going on memory.

    HTH
    LE15-Thumper
    "Give me JBL, or give me death"

  3. #3
    Senior Member Uncle Paul's Avatar
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    Looks like your memory is pretty good: http://manuals.harman.com/JBL/HOM/Te...0Plus%20ts.pdf
    "Zobel is as zobel does"

  4. #4
    RIP 2011 Zilch's Avatar
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    Sometimes you feel like an inductor:

    L88 had one (in the highpass):

    http://manuals.harman.com/JBL/HOM/Te...0Nova%20ts.pdf

    Plus don't.

    Once upon a time, L100 had them, too:

    http://manuals.harman.com/JBL/HOM/Te...NTURY%20ts.pdf

    What's that have to do with anything...?

  5. #5
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    gracias

    Thanks for the input, gentlemen.

    I am taking my L88Ps (2 pair) to the next level. I have an M12 expander kit for one (they are difficult to locate). The N120 crossover module in the M12 only adds a 10285 8 ohm L Pad and a 3 microfarad cap. I have spare 10285s. I believe I can make this modification with little trouble. 104H-2s in place of the LE5-2.

    Whatta ya think?
    I think we're all Bozos on this bus...

  6. #6
    Senior Member Rusnzha's Avatar
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    I built charge coupled crossovers for my L100s and swapped out the LE 5-2s with 104H-2 mids. Got em hooked up to an old Mac 1900. Due to the 123A-3 woofers, they still sound like L100s, but a lot better. This is a bedroom system. I don't always sleep too good. When these are playing, this never seems to be a problem.

  7. #7
    RIP 2011 Zilch's Avatar
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    Quote Originally Posted by supertech View Post
    Whatta ya think?
    I think there is a better option:

    http://www.audioheritage.org/vbullet...070#post123070

    Two there, actually....

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