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Message: <blockquote data-quote="Alex JB" data-source="post: 5459502" data-attributes="member: 602795">I've just started to use that song as one of my reference tracks also.I recently built a test box for a single Sundown E8 and with 0.6 Cu ft net and the port tuned to 32Hz, the 30 - 80hz was definately loud, as expected the roll off was steeper below 32 than I have experienced before with sealed set ups, but not as steep as I'd imagined.  I could hear the note you are talking about, maybe at 1/2 the audible volume of the higher stuff.You have made me wonder though weather I need a ported design for the 2 x E8's that are going in my truck now.I guess the only way to truly see what suits the vehicle and your ear best is to build a variable displacement box with removeable/adjustable porting and do a series of tests with your test tracks from your music types.</blockquote>

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