Instructables

Step 4: Add the Electromagnets

For this step all you need to do is tape the electromagnets to the base, so that they won't interfere with the plastic moving. Also so the side of the coil is in the middle of the speaker. Why will be explained later.
 
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Jollyrgr7 years ago
You could drill a hole in the top at each coil and then another from the side to intersect the top hole for running the wires.