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<blockquote data-quote="Alex JB" data-source="post: 5390131" data-attributes="member: 602795">sounds like an under seat truck box, exactly what I&#039;m building.I&#039;ve had great results so far with the single sub box with the slot port being at the other end of the box from the sub.as for the port area and length, you&#039;ll need to use the formulae or a calculator program, the length will not be the same either.for me one sub was at 3.4&quot; diameter with 26&quot; lenght, going to 2 x the same driver went to 4.8&quot; diameter with 39&quot; length.Converted into slot porting that&#039;s a 4 x 2.4 port up to a 4 x 4.5 port.You can have a copy of my spread seet witht he basic calcs in if you like, your best bet is to download winISD or use the online calculator for ports.<a href="http://www.carstereo.com/help/Articles.cfm?id=31" target="_blank">http://www.carstereo.com/help/Articles.cfm?id=31</a></blockquote>

[QUOTE="Alex JB, post: 5390131, member: 602795"] sounds like an under seat truck box, exactly what I'm building. I've had great results so far with the single sub box with the slot port being at the other end of the box from the sub. as for the port area and length, you'll need to use the formulae or a calculator program, the length will not be the same either. for me one sub was at 3.4" diameter with 26" lenght, going to 2 x the same driver went to 4.8" diameter with 39" length. Converted into slot porting that's a 4 x 2.4 port up to a 4 x 4.5 port. You can have a copy of my spread seet witht he basic calcs in if you like, your best bet is to download winISD or use the online calculator for ports. [URL="http://www.carstereo.com/help/Articles.cfm?id=31"]http://www.carstereo.com/help/Articles.cfm?id=31[/URL] [/QUOTE]

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