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Message: <blockquote data-quote="T3mpest" data-source="post: 6607679" data-attributes="member: 560148"><p>A sealed box rolls off at 12db/octave a ported rolls off at 24db/octave below tuning.  A ported will almost always have more output near the bandpass the port plays in, go much below that and the slow dropoff of a sealed box wins out.  However, in alot of cases that happens at like 25hz or lower, which isnt' much good for music since very little goes that low.  Just depends on your design goals, if you really want to get low IB, which is  a big sealed box (more or less) or a LLT (a huge ported box tuned in the single digits) are usually the two common approaches, so both can really work.  Regardless in car cabin gain is huge so anything can play very low, just depends on what kind of frequency response you want and how much overall output.</p></blockquote><p></p>

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