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Message: <blockquote data-quote="JayRich" data-source="post: 3492596" data-attributes="member: 572241"><p>if im not mistaken , from what i've heard having the windows down is like creating a 4th order bandpass in the vehicle. Similar to having the box ported creating a way for the air to escape the cabin. So if your windows are up its like having a sealed box, but once the windows are open, its similar to having a ported box thus getting louder and lower extension. i'm not 100% but thats what i've gathered from others on here.</p></blockquote><p></p>

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