Ethan Clarke
If you need to open your JBL plastic PA speakers for repair or maintenance, there are a few steps you should follow. First, gradually ease the grill off from both sides and the top to prevent breakage of the plastic pins. Once inside, you can examine the loudspeakers and identify any issues, such as woofer or tweeter problems. If you need to remove the speaker element, use a Phillips screwdriver to take out the screws.
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What You'll Learn
Ease the grill off gradually
To open a JBL plastic PA speaker, you must first ease the grill off gradually. This process requires careful attention to prevent breakage of the plastic pins. Start by gently prying the grill away from the speaker housing using a suitable prying tool. Work your way slowly and carefully around the edges of the grill, applying even pressure to both sides and the top. Be cautious not to apply excessive force, as this can damage the plastic pins that secure the grill in place.
The process of easing off the grill gradually is a delicate task that demands patience and precision. Work at a steady pace, ensuring that you are not rushing through it. By applying gentle and consistent pressure, you can gradually loosen the grill's hold on the speaker. It is crucial to maintain a firm but controlled grip on your prying tool to avoid any accidental slips that could damage the speaker or cause injury.
As you work your way around the grill, pay close attention to the plastic pins that secure it in place. These pins are crucial for holding the grill in place, and they can be prone to breakage if excessive force is applied. If any of the plastic pins appear damaged or weakened, take extra care in that area to prevent further damage. Remember to maintain even pressure on both sides and the top of the grill to ensure a smooth and controlled removal process.
In addition to using the appropriate tools and techniques, it is essential to work in a well-lit area that allows you to clearly see what you are doing. A magnifying glass or a bright desk lamp can be useful to get a clearer view of the plastic pins and the areas where the grill meets the speaker housing. By having a good visual of your work area, you can make more precise adjustments and reduce the risk of accidental damage.
Taking your time and working with caution are key factors in successfully easing off the grill of your JBL plastic PA speaker. By following these instructions and paying close attention to your work, you can safely remove the grill without causing any damage to the speaker or its components. Remember to handle the grill with care even after it has been removed, as the plastic pins will remain vulnerable until the grill is securely replaced.
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Examine the loudspeakers
Before opening your JBL plastic PA speakers, it is important to carefully examine the loudspeakers to ensure you are aware of their various components and can identify any potential issues. Firstly, inspect the overall condition of the loudspeakers, looking out for any visible damage such as cracks, dents, or loose parts. Pay close attention to the speaker cones, as any tears or punctures could affect sound quality.
Next, check the wiring and connections. Make sure that all wires are securely attached and show no signs of fraying or damage. Inspect the terminals and connectors for any signs of corrosion or damage, as this could impact the sound quality and performance of the speakers.
Examine the speaker magnets, which should be securely attached and free from damage. Look for any signs of rust or chipping, as this could indicate a need for replacement or repair. Also, inspect the speaker surrounds, which should be intact and pliable, without any cracks or tears.
Additionally, test the speakers by connecting them to a power source and audio input. Listen for any unusual noises, such as buzzing, rattling, or distortion, which could indicate a problem with the internal components. Ensure the speakers produce clear and crisp sound at different volume levels and audio frequencies.
Finally, if your JBL plastic PA speakers are equipped with additional features, such as Bluetooth connectivity or built-in lights, test these functions to ensure proper operation. This includes pairing the speakers with a Bluetooth device, adjusting light settings, and verifying that all controls and buttons are responsive.
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Remove the damaged speaker element
Before you begin, make sure that you actually need to disassemble your speaker. If you simply need to clean it or replace the battery, there are other, less invasive methods you can try first.
Now, to remove the damaged speaker element, first ease the grill off gradually from both sides and the top. This will prevent the breakage of plastic pins. Next, use a Phillips screwdriver to remove any screws. If possible, replace the damaged element with a working version to make sure that wiring is not the problem.
If you are removing a woofer, you will need to clean the old foam surround from the woofer cone and the speaker basket. The basket can be cleaned with the tip of a flat screwdriver, but be careful when dealing with the cone to prevent tearing or puncturing it.
If you are removing a tweeter, the overall sound will be very muffled.
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Clean the old foam surround
To clean the old foam surround of your JBL speakers, you must first remove the old foam. Use your fingers to peel away most of the foam, then use a cotton swab soaked in 91% rubbing alcohol to carefully remove the remaining foam from the metal ring. You can use a sharp wood chisel to scrape off any stubborn bits. Be careful not to damage the metal ring.
After removing the old foam, the next step is to clean the remaining glue from the OEM install. Use a straight-edge Xacto knife to carefully scrape away the glue. It is a time-consuming process, so be patient and careful. You can also use rubbing alcohol to help remove the glue. Soak a cotton swab in rubbing alcohol and carefully apply it to the remaining glue, then use your fingernail or a gentle tool to scrape away the residue.
It is important to remove as much of the old glue as possible to ensure a smooth surface for the new foam surround. Once you are satisfied with the cleaning process, let the remaining glue come into contact with air for about 12 hours. This will help the regluing process and prevent interaction between the old and new adhesive.
After the surface is clean and dry, you can proceed with the next steps to install the new foam surround.
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Glue new surrounds to the cone and basket
To glue new surrounds to the cone and basket of your JBL PA speaker, you can follow these steps:
First, ensure that the cone and basket are clean and free of any old adhesive. You can use a combination of rubbing alcohol and adhesive removers like goo gone, along with a sharp tool like an Exacto knife, to gently scrape away any residue. This step is crucial for achieving a strong bond between the new surround and the cone.
Next, prepare the new surround. If you are using a foam surround, a repair kit like the Speaker Foam Edge Repair Kit for JBL by Simply Speakers includes a new foam surround, glue, and instructions. You can also create your own surround using cloth. In this case, trace the shape of the surround onto the cloth, cut it out, and make slight compound cuts along the edges.
Now, it's time to apply the glue. Put a ring of glue on the edge of the cone. Work quickly, as some glues, like the one included in the Simply Speakers kit, dry fast. Gently message the inner part of the foam onto the top surface of the cone. You can use a small paintbrush to apply the glue thinly and evenly.
After the cone and inner part of the ring are glued, apply glue to the woofer's metal mounting ring. Squish the outer part of the foam surround down flat, working your way around and pressing the foam down. Ensure that the surround overlaps the speaker cone on the inside edge and the speaker basket on the outside edge.
Finally, allow the glue to dry. Depending on the type of glue you use, you may need to let it dry for several hours or even overnight. Some glues dry faster in direct sunlight or a warm environment. Once the glue is dry, you can reassemble your speaker and test it out.
Remember to work carefully and follow the specific instructions provided with your chosen repair kit or glue. With these steps, you can successfully glue new surrounds to the cone and basket of your JBL PA speaker.
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Frequently asked questions
Ease the grill off gradually from both sides and the top to prevent breakage of the plastic pins.
Examine the loudspeakers in the cabinet. Woofer problems are audible as a distinct lack of bass and visible as dried-out foam or tears in the cone. Tweeter problems will make the overall sound very muffled.
Remove the damaged speaker element from the cabinet. Use a Phillips screwdriver to remove any screws. If possible, replace any non-working elements with working versions to make sure that wiring is not the problem.
