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Message: <blockquote data-quote="Che&amp;#1071;RyMan" data-source="post: 8320831" data-attributes="member: 662580"><p>Thats Completely on target Jeff most vent calculators do not let you factor in how much power youll be putting through the vent so they use the optimal area which is 28sq" per sub (refer to page 234 for this chart Jeff in BasssBox Pro).   When you graph velocity and factor in the amp's power 2.5" is well below the 110ft/sec that bassbox recommends. The max space available was 35"wide so 33" was the max I was comfortable using.  In an ideal situation the vent would be bigger a choice I didn't have unless the box design radically shifted to a top fire.</p></blockquote><p></p>

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