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Thread: JBL LX 30 crossovers

  1. #1
    slxrti
    Guest

    JBL LX 30 crossovers

    I have a pair of LX 30 crossovers. I would like to verify that the crossover freq is 800hz/7khz and the rate is 12 db/octive.

    thank, spencer

  2. #2
    Obsolete
    Join Date
    Apr 2003
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    12,193

    Re: JBL LX 30 crossovers

    The filter for the 124 slopes off at ~ 6 dB / octave
    The filter for the LE5 slopes off at ~ 12 dB / octave
    The filter for the 077 slopes off at ~ 18 dB /octave

    The voltage drive crossover frequencies with a standard 8 ohm test load are -3 dB at 550 Hz and -11 dB at 9 kHz. They behave correctly with the proper transducer loads. The networks take into account the acoustic response of the transducers and attenuate accordingly.

    Where did you ever get hold of a pair of LX30's and do you have the rest of the S21 systems?

  3. #3
    slxrti
    Guest

    Lx30

    I puchased these 25 years ago as seperate components,
    They are destine for ebay.

    slxrti

  4. #4
    Obsolete
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    Apr 2003
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    Re: JBL LX 30 crossovers

    Ah!

    Then you might just reference http://www.lansingheritage.org/image...comp/page7.jpg or http://www.lansingheritage.org/image...omp/page08.jpg rather than bring up the network service bulletin stuff.

    These are those LX30's and not the original LX30 out of the L100/4310 right?

  5. #5
    slxrti
    Guest

    lx30

    They are stand alone units with a seperate adjustment for mid and high freq drivers. A cable attaches the crossover to the controls.

    A cast face plate houses the level adjustments.

    slxrti

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