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    tank65's Avatar
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    new build going on this week, in final stages of planning. need help though

    Well since my first build for the l7s screwed me over by an inch after 2 remodels on the same box im starting over. i am doing 2 seperate boxes for my 15in l7's.

    After sub displacement it is 4.41 cubic ft. each. now i want to tune to anywhere between 30-34 most likely 30 because i want to be heard coming from a long ways heh. But can someone help me figure out a port design? either slot or tube.



    thats the design of the box. i was hoping to have the port towards the back so it shoots up vertically into where i removed my 6x9's.

    internally its 16.25in. in height
    16.50in. in width
    29.50in. depth

    any help would be appriciated i know theres calculators out there but id rather get some expert help off here if im doing anything wrong lol







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    Re: new build going on this week, in final stages of planning. need help though

    Quote Originally Posted by tank65 View Post
    After sub displacement it is 4.41 cubic ft. each. now i want to tune to anywhere between 30-34 most likely 30 because i want to be heard coming from a long ways heh. But can someone help me figure out a port design? either slot or tube.
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    Re: new build going on this week, in final stages of planning. need help though

    well im looking for whatever sounds better inside the car. so would going around 34hz do it for me?




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    Re: new build going on this week, in final stages of planning. need help though

    30hz is fine man...but I would tune a tad higher...maybe 33-34. Just because music doesnt often dip below 33hz. and you will gain a little output with a higher tuning frequency.




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    Re: new build going on this week, in final stages of planning. need help though

    alright thnx, now my only problem is how to do the port. if i dont have enough room to face the port vertically can i just port it on the back of the box towards the back seat?




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    Re: new build going on this week, in final stages of planning. need help though



    so thats what ive come up with tuned to 33hz. good or no?




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    Re: new build going on this week, in final stages of planning. need help though

    ok so i went with tube ports this time on the finaly sketchup. three , 3in. ports at 9in. long each for 34hz. ill be building both boxes on the weekend





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    Re: new build going on this week, in final stages of planning. need help though

    you need more port area for a 15L7, 3" is tiny



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    Re: new build going on this week, in final stages of planning. need help though

    k so what about two 5in ports?




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    Re: new build going on this week, in final stages of planning. need help though

    bump, need to know by tomorrow so i can pick everything up at once. two 5in. ports on each box at 17.1in long for 34hz




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