as far as i know the adaptor will be installed in the trunk so you have a line output directly there where you need it.
no work at all...

i dont know the volume of the OE Enclosure but anyway..just try it. you dont always have to calcuate the exact volume. if it sounds crappy use cotton wool to "increase" the volume.

have fun !

p.s. working with glass fiber to create a sub enclosure is not that difficult as many think.

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