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Thread: JBL 3133 crossover schematic

  1. #1
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    JBL 3133 crossover schematic

    Looking for schematic for this crossover. Please direct me if this info is available. Thanks

  2. #2
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    Quote Originally Posted by vmax700 View Post
    Looking for schematic for this crossover. Please direct me if this info is available. Thanks
    See: LINKS, JBL PROFESSIONAL at the bottom of the site cover page.

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    schematic

    Not seeing where you are trying to direct me. please more specifics.

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  5. #5
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    crossover

    thanks

  6. #6
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    That is the "bi-ampable" version used in the 4333s. This is the home version for the L300s. Simpler and easier to understand.

    http://www.jblproservice.com/pdf/Net...%20Network.pdf

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    3133 crosover

    I have the biamp version and thank you. I am getting low volume from the LF driver and HF driver, the mid 2420 I have no response. i have confirmed continuity on the 2420. I am assuming failed components in the x-over.

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    My first thought would be corrosion in the biamp switch.

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    3133 crosover

    I did spray cleaner into the biamp switch and manipulated the switch many times. I am certainly open to trying again. Any thoughts? I tried to remove this switch from the cabinet but after removing the 4 screws holding it to the back cabinet I was unable to get it to move. I wonder if it is glued in place and did not want to force anything. Thanks

  10. #10
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    JBL 3133 crossover schematic

    Guys after some adjusting of the L-pad I was able to get the MF driver operating well however the HF driver sounds very low. Can the pots be cleaned with deoxit? Anyone with any success please reply

  11. #11
    Senior Member BMWCCA's Avatar
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    I might suggest by-passing the bi-amp switch:
    http://audiokarma.org/forums/index.p...pgrade.537606/
    ". . . as you have no doubt noticed, no one told the 4345 that it can't work correctly so it does anyway."—Greg Timbers

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