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    BlactimusCrime's Avatar
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    Could someone check my math?

    I have come up with a box design for my isuzu rodeo. For a DD9518g D4 on 2 DSC1500s strapped at 2. Box is 6 cubes after displacements, 114 sq inches of port (38"x3")and 22.75 inches long. Box is sub up, port back along the bottom of box. Supposed to be tuned to 40hz
    Last edited by BlactimusCrime; 11-22-2012 at 09:33 PM.




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    Re: Could someone check my math?

    i came up with 40hz.




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    Re: Could someone check my math?

    yep, tuning is around 40hz and the port size exceeds the 9:1 ratio by a significant amount. Make the port more square and less rectangular. The current port is improperly tuned to begin with and you are added phasing and airflow issues by exceeding a 9 to 1 ratio with the opening, Bad design, start over.



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    Re: Could someone check my math?

    why in the heck does it matter what the hight/width ratio is?




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    Re: Could someone check my math?

    hmm...maybe you should reconsider building your own box.....what others hinted at was trying to avoid sounding like a toilet bowl fart.




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    Re: Could someone check my math?

    Quote Originally Posted by BlactimusCrime View Post
    why in the heck does it matter what the hight/width ratio is?
    Because of the airflow
    @keep_hope_alive ; @Moble Enclosurs ;


    Those guys can explain it better.



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    Re: Could someone check my math?

    Loudspeaker Design Cookbook 7th Edition Book 500-035

    if you don't have this reference already, get this before you design another enclosure. read it. everyone will reference it.

    PM me if you just want an electronic version.



    have you been helped by me? i'd love to know. shoot me a PM.

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    Re: Could someone check my math?

    Quote Originally Posted by keep_hope_alive View Post
    Loudspeaker Design Cookbook 7th Edition Book 500-035

    if you don't have this reference already, get this before you design another enclosure. read it. everyone will reference it.

    PM me if you just want an electronic version.
    can anyone pm you for it, or is it exclusively for Blactimus?



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    Re: Could someone check my math?

    Quote Originally Posted by token1er View Post
    can anyone pm you for it, or is it exclusively for Blactimus?
    x2, I would love a copy



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    Re: Could someone check my math?

    common eddie, you know better than that....

    i would also love a digital copy of that, i had it once but it disappeared.



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    Re: Could someone check my math?

    Quote Originally Posted by keep_hope_alive View Post
    Loudspeaker Design Cookbook 7th Edition Book 500-035

    if you don't have this reference already, get this before you design another enclosure. read it. everyone will reference it.

    PM me if you just want an electronic version.
    Thanks!

    Quote Originally Posted by Phoenix Risen View Post
    common eddie, you know better than that....

    i would also love a digital copy of that, i had it once but it disappeared.
    No, I dont, have you ever seen me run a slot port in my car? nope, Im always lazy and use aeros.




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    Re: Could someone check my math?

    Going to go with a 26w X 4h and 20.75L port




    Quote Originally Posted by loudrc View Post
    fuck you eddie.
    Quote Originally Posted by dbeez View Post
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    Quote Originally Posted by CRXBMPN View Post
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    Re: Could someone check my math?

    that should get the job done, also remember loading into the back wall may very well drop your effective tuning a bit.



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    Re: Could someone check my math?

    Quote Originally Posted by Phoenix Risen View Post
    that should get the job done, also remember loading into the back wall may very well drop your effective tuning a bit.
    Thats why its tuned so high.




    Quote Originally Posted by loudrc View Post
    fuck you eddie.
    Quote Originally Posted by dbeez View Post
    Judge me not by what i've done but the amount of haters on my balls.
    Quote Originally Posted by CRXBMPN View Post
    you have the best user ID on teh site playa
    Refs: NateBerrier, Thegreatestpenn, mossberg385t, mfenske, plugitin, retroaudioinc, michaellane, Ge_off_me
    Feedback- http://www.caraudio.com/forum/buyer-seller-feedback/489798-bumpinboats-feed-back-thread.html#post7273394

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    Re: Could someone check my math?

    I say aeros... but thats just me.




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