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  #1  
Old 08-06-2012, 05:32 PM
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I just picked up a pair of 15" XL M1's going to be reconing them to .7 coils and running them off of a Crescendo 3kwp for now but plan on moving up in power later. I currently have a pair of LVL 4 M1's running off of the same amp installed now the car is a 2007 impala, with this set up i ported the rear deck with 4 4" aero's tuned to 32 this box is to small for my new subs going to be building a new box for them and i would like to port the rear deck with a square/slot port to get a little more port area thought this would be better than trying to use the areo's again due to the flares i can only get the four in the deck, box is going to be 17hx36wxd27 this going to give me 7.89 gross 7.43 after sub displacement i want to tune this to 33HZ but i'm not sure how to calculate port area for a square/slot type port need some help with this any and all help is appreciated. Going to be building this in the trunk and the port will be partially external.
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Old 08-06-2012, 05:56 PM
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Is that external dims, b/c I got 9.56 from your dims?
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Old 08-06-2012, 06:02 PM
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Gross I got 7.89
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Old 08-06-2012, 07:00 PM
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Gross 7.89 external 7.43 after sub displacement.
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Old 08-06-2012, 07:07 PM
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What's your desired width of the port?
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Old 08-06-2012, 09:05 PM
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Port width i was thinking 8".
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