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Message: <blockquote data-quote="GSG2Teg" data-source="post: 8486615" data-attributes="member: 666289"><p>I'm just guessing, but I'm thinking air flow.  In a ported box you have the port to allow air flow creating less stress on the sub and amplifier.  In a sealed box you are making the amp push harder because their is more resistance being pushed back against the sub.  Plus it sounds like you went from one sub to two.  Def. invest in a good CCA battery.  I made the mistake of going with a cheap battery and my two 10" Pioneers in a bandpass box were making my lights dim.  I might've turned my amp down a little after the new battery but I noticed the amp was warmer than usual and compared to my other amp but it's not running subs.  Second battery would be the way to go though from what I've been reading.</p></blockquote><p></p>

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