Alpine LC70-69P - Front Door Preparation; Cut Speaker Clearance Hole in Door; Mark and Drill Rivnut Holes; Clean and Rust-Proof Edges

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Preperation: Front Door
Take a hole punch and mark out the holes required for the rivnuts.
Use your prefered sheet metal cutting tools, such as a air hacksaw or similiar to cut
the marked speaker clearance hole in the door.
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Preperation: Front Door
Clean up any sharp edges with sandpaper. Then rust proof any bare metal exposed by
the cutting and drilling.
Use a drill and 3mm bit to create a pilot hole. Then use the 9mm drill bit to create the
hole for the rivnut itselt.
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