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Message: <blockquote data-quote="jellyfish420" data-source="post: 612939" data-attributes="member: 555729"><p>the bigger port tuned higher will yeild  higher spl, but will not go as low. the smaller one tuned lower will not have quite the spl, but will go much lower. tuning freq of the box, i perfer not to do anything over 35, but most of my boxes are 30Hz. and the SSF is you sub-sonic filter on your amp...it filters notes under a certain frequency.</p></blockquote><p></p>

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