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<blockquote data-quote="hispls" data-source="post: 8588003" data-attributes="member: 614752">You saw for yourself it won&#039;t happen in your airspace.&nbsp; Do play with port length and compare what you hear to what you see on that program.&nbsp;&nbsp; The lines you see on the software (doesn&#039;t much matter which, the math is long established and the formulas the same).&nbsp; You&#039;ll find that the line you see is going to be more accurate with the box outside or in a very large room.&nbsp; Reflected sound waves add peaks and nulls when you put it in the car.&nbsp; These vary of course but are somewhat predictable, all of the low end will be exaggerated and you&#039;ll typically get a bump around tuning (regardless of the predicted curve) and a bump somewhere between 45 and 60hz wherever your vehicle resonates.I can tell you what you explained when you first made this post is consistent with the 2 humped camel I explained and what that green line you plotted will actually sound like in-car.</blockquote>

[QUOTE="hispls, post: 8588003, member: 614752"] You saw for yourself it won't happen in your airspace. Do play with port length and compare what you hear to what you see on that program. The lines you see on the software (doesn't much matter which, the math is long established and the formulas the same). You'll find that the line you see is going to be more accurate with the box outside or in a very large room. Reflected sound waves add peaks and nulls when you put it in the car. These vary of course but are somewhat predictable, all of the low end will be exaggerated and you'll typically get a bump around tuning (regardless of the predicted curve) and a bump somewhere between 45 and 60hz wherever your vehicle resonates. I can tell you what you explained when you first made this post is consistent with the 2 humped camel I explained and what that green line you plotted will actually sound like in-car. [/QUOTE]

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