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<blockquote data-quote="kickerlivinloud" data-source="post: 440827" data-attributes="member: 552730">Ok to cut the cost of my system I am building my enclosure completely my self.&nbsp; I have it custom designed to my trunk so it is really hard to explain what it looks like.&nbsp; B/4 any type of dissplacement I have come up with about 6 cubs of space.&nbsp; I am hopeing that with the diss. of the wood, driver, and port it will be closer to 5 cubs.&nbsp; My main problem now is trying to figure out how much port area I need.&nbsp; Using the caculators over at loudspeakers101&nbsp; I have gotten this info...<a href="http://www.loudspeakers101.com/VentCal1.htm" target="_blank">http://www.loudspeakers101.com/VentCal1.htm</a>Minimum Diameter =&nbsp; 15.05 inchesMinimum Area = 177.98 inchesLength of a side for a square vent = 13.34 inchesThis is all for an 15&quot; sub with 38mm Xmax tuned at 45Hz.&nbsp; What I want to do is either make a plug or and extention to lower the freq. to 28Hz for daily driving.&nbsp; Should I use a 13&quot;X13&quot; inch port or should I make it smaller.&nbsp; I am totaly new to the actual install part of car audio so bear with me.&nbsp; If so, how can I make a plug/extentsion to reach the 28Hz????I am open to ideas...Your input is appreceated...Jon</blockquote>

[QUOTE="kickerlivinloud, post: 440827, member: 552730"] Ok to cut the cost of my system I am building my enclosure completely my self. I have it custom designed to my trunk so it is really hard to explain what it looks like. B/4 any type of dissplacement I have come up with about 6 cubs of space. I am hopeing that with the diss. of the wood, driver, and port it will be closer to 5 cubs. My main problem now is trying to figure out how much port area I need. Using the caculators over at loudspeakers101 I have gotten this info... [URL="http://www.loudspeakers101.com/VentCal1.htm"]http://www.loudspeakers101.com/VentCal1.htm[/URL] Minimum Diameter = 15.05 inches Minimum Area = 177.98 inches Length of a side for a square vent = 13.34 inches This is all for an 15" sub with 38mm Xmax tuned at 45Hz. What I want to do is either make a plug or and extention to lower the freq. to 28Hz for daily driving. Should I use a 13"X13" inch port or should I make it smaller. I am totaly new to the actual install part of car audio so bear with me. If so, how can I make a plug/extentsion to reach the 28Hz???? I am open to ideas... Your input is appreceated... Jon [/QUOTE]

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