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Message: <blockquote data-quote="helotaxi" data-source="post: 1834985" data-attributes="member: 550915"><p>Block off the approximate volume to be occupied by the enclosure.  Get a test box (needs to be sealed to minimize impedance rise) and a test sub and place them in the approximate location of the sub enclosure.  With Db meter in hand (just a basic Radio Shack model will work you don't need to get too loud for this test) play test tones of each frequency at the same volume and see where it peaks.  You have now just plotted your car's cabin gain.</p></blockquote><p></p>

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