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Message: <blockquote data-quote="ttocs" data-source="post: 1363643" data-attributes="member: 11896"><p>Ok so if your running 8s already then you should know what to expect.  If you were to add 2 more subs, and then double the power to all 4 you could expect to pick up 3db of sound more then likely around the tuning freq for the box(if its done right). I know it doesn't sound like much but because the equation for sound is exponential doubling the output of it is equal to approx. a 3db gain.  Now adding only one more sub obviously means you will not get the 3db.  So of course it leads us all asking the question of if its worth the trouble to do all this for a 1-2 db gain?  Well only you can answer that...</p></blockquote><p></p>