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Thread: JBL L-77 Crossover Schematic

  1. #1
    vifa32144
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    JBL L-77 Crossover Schematic

    Can someone send a schematic of the JBL L-77 crossover? That would include cap, coil, resistors, and l-pad hookup.

  2. #2
    Obsolete
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    Re: JBL L-77 Crossover Schematic

    JBL LX4-2 Network
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  3. #3
    vifa32144
    Guest

    JBL L-77 Crossover Reply

    Thank you for the JBL L-77 crossover schematic. Do you know what the impedance is for the 3 position switch?

  4. #4
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    Re: JBL L-77 Crossover Reply

    The three position switch is just a rotary switch, it isn't an L-Pad. The high pass is 3 kHz with -1, -5, and -9 dB of attenuation depending on where the switch is set. The resistors were each rated at 11 watts.

  5. #5
    vifa32144
    Guest

    Reply to L-77 crossover schematic.

    Do you know where to purchase such a rotary switch without trying to buy from JBL?

  6. #6
    jcdahl
    Guest
    You can get one from Mouser

    http://www.mouser.com/catalog/617/886.pdf

    It is an adjustable stop single pole 2 to 12 position switch. Y ou can set it to have three positions.

    JCD

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