How To Clean a Voice Coil Gap

You must clean the magnetic gap in a compression driver before installing a diaphragm and in a speaker before replacing the voice coil. You must make sure that no dirt, metal filings or pieces of old vc windings remain behind that will negatively affect the repair.

Use a 1/4″ piece of shim or thin card stock. Fold a piece of masking tape over it- sticky side out. Pull tight. Insert into gap and move 360ยบ until you have worked around the entire circle. Repeat until the tape remains clean several times. As a final step, visually inspect.

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