Alexei Volkov
Sealed plastic speakers can be a pain to open, but it's not impossible. Whether you're trying to repair or tinker with your speakers, there are a few methods you can try. The tools you'll need will depend on the method and the type of speaker you have, but generally, you'll want to have screwdrivers, a sharp blade, and something to create heat like a hairdryer. You can also use power tools like a drill or a Dremel tool, but be careful not to damage the internal components of your speakers. With the right tools and some patience, you'll be able to open up your sealed plastic speakers and get to work.
| Characteristics | Values |
|---|---|
| Tools | Two medium or large flat-head screwdrivers, a sharp broad blade wood chisel, a Phillips-head screwdriver, a utility knife, a multi-tool with a metal blade, a hairdryer, a drill, needle-nose pliers, a hacksaw, a Dremel tool, a jigsaw or saber saw |
| Process | Apply gentle pressure to the elongated slots on the base of the speaker cabinet with two flat-head screwdrivers to separate the plastic speaker grille from the speaker cabinet; use a hairdryer on low heat to loosen the glue, then use a thin blade to cut around the edge; if the speaker doesn't open with heat, use a drill to bore through the plastic, then cut along the edge with a utility knife; use needle-nose pliers to twist off plastic clips; use a screwdriver to loosen the speaker's terminals, then insert guitar picks between the speaker cone and magnet; use a hacksaw or utility knife to cut away at the speaker's edges if it is encased in a thick plastic shell; use a screwdriver to release the speaker's components once an opening has been made; use a jigsaw or saber saw to remove the panel that the speakers are mounted on |
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What You'll Learn
Using a hairdryer or heat gun to loosen glue
If you're looking to open a sealed plastic speaker, you might be better off using a hairdryer or heat gun to loosen the glue, rather than using tools such as screwdrivers or knives, which may damage the speaker.
First, lay the speaker cabinet on its back. Place the speaker on a clean, heat-resistant surface or mat, and keep flammable materials away from your work area.
If you're using a hairdryer, set the temperature to "hot" and the fan setting to "low". Position the nozzle 2–3 inches (5–7.6 cm) above the speaker and move the hairdryer in small circles above the glued area for 30 seconds.
If you're using a heat gun, follow the instructions provided by the manufacturer. Heat guns emit much hotter air than hairdryers, so exercise caution when using one.
Once the glue has been sufficiently loosened, gently pry the speaker grille away from the cabinet. Be careful not to damage the foam seal between the grille and the cabinet, as this is necessary to prevent vibration and create a sound-tight enclosure.
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Applying pressure to the elongated slots on the speaker cabinet
To open a sealed plastic speaker, you will need two medium or large flat-head screwdrivers. Place the speaker cabinet on its back and locate the two elongated slots on the base. Insert the two flat-head screwdrivers into these slots simultaneously and gently apply pressure to start separating the plastic speaker grille from the wooden speaker cabinet. This technique leverages downward pressure on the wooden cabinet and upward pressure on the plastic grille, causing the glue to give way without damaging the components.
It is important to work slowly and carefully when applying pressure to the elongated slots. The goal is to gradually loosen the glue points that secure the grille to the cabinet. By applying gentle but unrelenting pressure, you can avoid sudden movements that could damage the speaker components. This process may take some time, but it is crucial to be patient and persistent.
If one corner of the grille remains stubbornly attached, focus your efforts there. Insert one flat-head screwdriver and a broad-face wood chisel along the plastic-wood seam on the bottom side of the speaker cabinet. Apply firm pressure on the screwdriver to slightly lift the corner, then carefully insert the wood chisel into the seam. Be cautious not to tear or damage the foam seal between the plastic and wood, as it is essential for preventing vibration and creating a sound-tight enclosure.
Once you have successfully separated one corner, repeat the process on the other corner. Continue working along the seam with careful but relentless pressure until you have loosened the entire side of the speaker grille. Remember to keep the glued areas clean and free of dirt and dust throughout the process.
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Using a drill to bore through the plastic
Drilling is a common method for machining plastic. If you want to use a drill to bore through the plastic of your sealed speakers, there are a few things to keep in mind. Firstly, drilling generates more heat than most other plastic machining processes, so heat reduction is critical to minimize stress on the plastic. You can preheat the plastic to 250°F (about 121°C) to help with this.
When it comes to the drill bit, a regular steel bit is recommended. If you need a larger hole than the steel bit can provide, a step bit can be used, but go slowly and control the drill to avoid damaging the plastic. A stepper bit is more expensive but will save you time as you won't need to change bits multiple times for each hole. To get a cleaner hole, a step drill bit or a hole saw bit is preferred over a spade bit. If you are drilling thin plastic, a step drill bit is ideal as it has multiple steps of different thicknesses.
To stabilize the drill bit and prevent wandering, it is recommended to use a pointed tool to make a dent in the center of the area you want to drill. Drilling a small pilot hole first can also help guide the larger bit. Additionally, clamping a "sacrificial piece" of wood behind the plastic can provide support and help guide the drill bit. This backing piece should be something disposable, like scrap wood, that you can push down on without damaging the plastic.
When drilling, work slowly and hold the drill straight to avoid damaging internal parts. Drill all the way through from one side to the other. Once you have a hole, you can use a thin blade or a knife to cut along the edge and open up the speaker.
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Cutting through the speaker's edges with a hacksaw
If you're looking to open a sealed plastic speaker, one option is to cut through the speaker's edges with a hacksaw. This method is particularly useful if you're dealing with a speaker encased in a thick plastic shell, such as an OtterBox, which can be challenging to pry open. Here's a step-by-step guide on how to do it:
Step 1: Prepare the Speaker
Before you start cutting, it's important to identify the type of speaker you have and understand its construction. Most plastic-molded speaker grilles have four, six, or eight tight-fitting peg-in-hole glue points. Identify these glue points and determine if there are any components that need to be removed or loosened first.
Step 2: Choose the Right Hacksaw
Select a hacksaw with a fine-toothed blade. A fine-toothed blade will allow you to cut through the plastic precisely and without destroying it. Avoid using a hacksaw with large teeth, as it will likely leave the plastic torn, shredded, or with uneven edges. If possible, opt for a plastic-cutting blade designed specifically for cutting plastic.
Step 3: Secure the Speaker
Clamp the speaker to a stable work surface, such as a table or workbench. This will prevent the speaker from moving around while you're cutting and ensure a straight cut. Make sure the speaker is securely fastened and won't shift during the cutting process.
Step 4: Start Cutting
Using your dominant hand, grasp the hacksaw firmly. With your other hand, guide the saw in smooth and quick back-and-forth motions along the edges of the speaker. Start with small slices, as the slick texture of the plastic may make it challenging to cut initially. Gradually increase the pressure and continue cutting along the edges until you've created an opening.
Step 5: Handle Internal Components
Once you've cut through the plastic and created an opening, proceed with caution. Use a screwdriver to carefully release and remove the speaker's internal components. Be mindful of wires, cones, magnets, and other sensitive parts. If there are plastic clips holding certain components together, you can use needle-nose pliers to twist them off gently.
Step 6: Clean and Prepare for Repairs
After successfully opening the sealed plastic speaker, it's important to keep the exposed areas free of dirt and dust. If you plan to repair or modify the speaker, refer to specific guides or seek expert advice to ensure you don't damage any critical components. Remember to handle the internal parts with care and pay attention to details like foam seals, which are crucial for sound quality and vibration control.
Remember to always prioritize safety when working with power tools like a hacksaw. Wear appropriate protective gear, including eye protection, to safeguard against any potential hazards. Additionally, always ensure that your work area is well-ventilated when working with plastic to avoid inhaling any fumes released during the cutting process.
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Using a screwdriver to loosen the speaker's terminals
Opening a sealed speaker can be a tricky task, especially if you want to avoid damage and keep the speaker functional. It is important to proceed with caution and use the right tools.
Firstly, lay the speaker cabinet on its back. Identify the elongated slots on the base of the speaker cabinet. These slots are where you will insert two medium or large flat-head screwdrivers simultaneously. Gently apply pressure with the screwdrivers to begin separating the plastic speaker grille from the wooden speaker cabinet. This process will help you access the internal components of the speaker without causing damage.
Now, to loosen the speaker's terminals with a screwdriver, you must first identify the type of terminal you are working with. Common types include spring clips, binding posts, banana plugs, pins, and spade connectors. Each type of terminal has a unique method of connection. For example, banana plugs often have screw-in connections that can be loosened with a small screwdriver. Pins, found on older speakers, also require tightening or loosening a small screw to secure the wire. Spring clips can usually be loosened with your fingers or a small screwdriver to create a gap for inserting the speaker wire.
When using a screwdriver to loosen the speaker's terminals, be cautious not to use a magnetized screwdriver as it can wipe away markings that indicate the speaker's positive and negative terminals. It is also important to be gentle and not force the screwdriver, as this may damage the speaker's internal components.
Once the terminals are loosened, you can proceed with repairing or modifying your speaker as needed. Remember to be careful and take your time throughout the process to avoid any accidental damage to your speaker.
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Frequently asked questions
You will need two medium or large flat-head screwdrivers. Lay the speaker cabinet on its back and locate the two elongated slots on the base. Insert the screwdrivers into these slots at the same time and gently apply pressure to begin separating the plastic speaker grille from the speaker cabinet.
You can use a utility knife or multi-tool with a thin metal blade to cut through the glue. You can also use a hairdryer on low heat to loosen the glue, making it easier to open the speaker.
If the speaker is particularly stubborn, you may need to use power tools. Carefully use a drill to bore through the plastic, holding it straight and working slowly to avoid damaging internal parts. Once you've created a hole, use a thin utility knife to cut along the edge.
The typical plastic-molded speaker grille has glue points that can be loosened with gentle and unrelenting pressure. You can also use a flat-head screwdriver and a broad-face wood chisel carefully inserted along the plastic-wood seam on the bottom side of the speaker cabinet. Be careful not to damage the foam seal between the plastic and wood, as it is necessary to prevent vibration and form a sound-tight enclosure.
