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Message: <blockquote data-quote="RAM_Designs" data-source="post: 6775143" data-attributes="member: 566575"><p>Box rise shouldn't be an issue, because as impedance rises as you get closer to tuning, the port helps out and gives you added output to compensate for the power that's being lost due to imp rise.  The huge port is possibly the culprit.  You have almost 20in^2 per ft^3, which might lead to the peakiness you're describing, as well as the sharp roll-off.  With huge ports like that, normally anything below tuning goes to complete shit because the sub just acts like it's in free air...that's the main reason I don't do big ports like that.  Smaller ports give you a smoother roll-off and less peakiness in most cases.  Personal preference, I guess.</p></blockquote><p></p>

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