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Message: <blockquote data-quote="squeak9798" data-source="post: 991547" data-attributes="member: 555320">Not invalid; just not complete.What are you referencing your in-car measurements to??  You can't just sit a sealed box in a car and tune your box to the frequency that hit the highest score because you are not isolating the sub/enclosure peaks from the peaks actually caused by vehicle.  Only way your testing will be worth a darn is if you do the exact same test in an open area, such as your yard (NOT a room in your house), and compare the two output levels.  The frequency with the greatest difference between in-car and open space testing is where you want to have your SPL box peak.Sorry if you already knew that........just sounded like you were going solely by the in-car measurements....which won't help you any by themselves.</blockquote>

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