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Old 09-16-2013, 10:16 PM
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Default need help with box for two dc xl 18's

so im having a little trouble figuring out how to figure out my port displacement. the box is 36w x 36d x 21h, so 13.4 before displacements minus the sub disp. it would be 12.9 after subs. I want to tune it to 33-34hz. I was going to do 266^2 in of port. If I type it into 12volt site I get the port has to be between 34 and 37 inches long so how would I figure the port displacement?
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Old 09-16-2013, 10:31 PM
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Oh ya and it will be running on a dat 5k @ 2ohms. and im doing 45s hopefully.
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Old 09-16-2013, 10:34 PM
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So you telling me can figure out displacement of a rectangle sub box but you cannot figure out the displacement of a rectangle port opening?
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Old 09-16-2013, 10:43 PM
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if I tune at 35hz the port displacement would be 3.86. so that would leave me with 9 cubes. Would I be choking the subs with only 4.5 each? I can always go taller by a few inches. I just don't want it to go to far over my back seat
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Old 09-16-2013, 10:45 PM
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Why so much port? Why not try around 150" of port.
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Old 09-16-2013, 10:48 PM
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Quote:
Originally Posted by sxpimpin View Post
Why so much port? Why not try around 150" of port.
I'm still trying to figure out all this port stuff. I went to a website (don't remember the name) that figured the minimum port area should be 266 so that's what I was going off of lol. I normally do smaller ports tho.
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Old 09-16-2013, 11:05 PM
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266 is way to much port. try 166sq in
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Old 09-16-2013, 11:10 PM
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I was thinking the same thing. i just need to get my cut sheet right before i go building up stuff.
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