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How to JBL L40

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  1. How to JBL L40, How to JBL L40: étape 1, image 1 de 1
    • To remove the speaker from the cabinet, unscrew the 4 screws being careful not to slip and pierce the paper cone.

    • Once the screws are removed gently pull the speaker out of the cabinet.

    • There will be 2 wires attached to the speaker, remove them making sure to mark the polarity of them if they are not marked already.

  2. How to JBL L40: étape 2, image 1 de 1
    • Here is the speaker removed from the cabinet, you can clearly see the degraded state of the foam surround. Luckily this makes it very easy to remove it.

    • These next steps require careful attention to detail. Work slowly and carefully. You do not want to puncture/tear/rip the paper cone or any other components.

    • Remove the black foam ring.

    • Try to do as much of this by hand as you can. You do not want to damage the ring as you will need it for re assembly.

    • Carefully run your knife between the ring and the outer metal edge.

    • Now using your hands and knife when needed remove the black ring from the speaker frame. Prying slowly. Take care not to tear it.

    • Once the ring is removed rub all of the old foam surround off and set aside for reassembly

    • Remove all of the old foam surround from the cone and speaker frame. It was so crumbly on mine that all it took was a bunch of rubbing with my fingers. If you are having trouble use your knife, but again be careful.

  3. How to JBL L40: étape 5, image 1 de 1
    • You can see some of the glue seeped out, it will dry clear so don't worry.

  4. How to JBL L40: étape 6, image 1 de 1
    • Spread glue on the ring you removed earlier

    • place over the foam ring and press on securly

    • allow everything over night to dry completely.

  5. How to JBL L40: étape 7, image 1 de 1
    • Connect the wires to the speaker being mindfull of the polarity.

    • Gently fit the speaker into the housing

    • Line up the screws and progressively tighten them until the speaker is secured

Conclusion

To reassemble your device, follow these instructions in reverse order.

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David Salerno

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