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    DIGIDIGIBOMBO's Avatar
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    Please take a look at my box

    Is it a good design? the net volume is 1.7ft^3, tuning frequency is 30Hz, used for a TS-W12PRS 12" sub.
    The port dimensions are ( 13.38x1.7"), box inner dimensions are ( L=15.74, W=13.93" and height=13.38").
    The port length=A+B+C=36.1"

    Forget about the 1.2 dimnsion thing on the pic, the pic is not to scale.
    But lets assume that we had a port so close to the inner box wall would it be a problem? i mean isnt there a minimum clearance that must be respected, held, between port and inner wall box???? Thx
    Last edited by DIGIDIGIBOMBO; 11-01-2005 at 04:05 AM.







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    Re: Please take a look at my box

    Anyone?




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    Re: Please take a look at my box

    A human being out there?




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    Re: Please take a look at my box

    How wide is the port at it's exit?? If it's the same between the end of "C" and the bottom of the photo you'll be fine.

    I would reccommend a port at least 3" wide...



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    I make rear-loaded, double crabshell, isobaric enclosures.

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    PV Audio's Avatar
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    Re: Please take a look at my box

    indeed, how much port area?




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    Re: Please take a look at my box

    What do u mean guys, i said the port dimensions are:13.38"x1.7":S its a rectangle. So the area is:22.746"^2, where is the problem??




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    Re: Please take a look at my box

    Doh didn't see that.


    1.7" is awful narrow. You will probably get some port noise from that.



    Comming Spring 2009


    I make rear-loaded, double crabshell, isobaric enclosures.

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    Re: Please take a look at my box

    The clearance needs to be at least 1 and 1/2 of the ports width.

    Your internal volume is 1.21ft^3 tuned to 35.5hz

    And that is before speaker displacment.

    Oh and I rounded out your dimmension. (L=15.75, W=14" and height=13.25"). Port - 13.25 x 1.75 x 36



    Quote Originally Posted by Scoobydoo View Post
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    Quote Originally Posted by audioholic View Post
    Your sig... Im trying to figure out if you think he spelled grammar wrong. Because, he didn't. Irony indeed.

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    Re: Please take a look at my box

    How the hell did u cpme up with that number man. 1.21ft????? well every 12"=1ft, my internal volume is: 15.75x14x13.25=2921.625"^3 which is 1.69ft^3.
    We divide the volume in inches cube by 12^3 to convert it to ft^3.:S:S:S, also evenb if the width of my port is verrrrrrryyy thin, where is the problem since i have the right area and length port. The thinner it is, i will increase the height of it, and probably the length of the port will be affected too. I have used a software and i didnt go below thge minimum required port area value. I still dont understand whats wrong thx
    I ve sued this software: http://www.carstereo.com/help/Articles.cfm?id=31
    Xmax=13.5mm, the minimum port area=22.19"^2 and mine is:22.746
    AHhhh dude the box dimensions are the inner dimensions not the outer, maybe u missunderstud me
    Last edited by DIGIDIGIBOMBO; 11-02-2005 at 11:56 AM.




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    Re: Please take a look at my box

    Quote Originally Posted by DIGIDIGIBOMBO
    How the hell did u cpme up with that number man. 1.21ft????? well every 12"=1ft, my internal volume is: 15.75x14x13.25=2921.625"^3 which is 1.69ft^3.
    We divide the volume in inches cube by 12^3 to convert it to ft^3.:S:S:S, also evenb if the width of my port is verrrrrrryyy thin, where is the problem since i have the right area and length port. The thinner it is, i will increase the height of it, and probably the length of the port will be affected too. I have used a software and i didnt go below thge minimum required port area value. I still dont understand whats wrong thx
    I ve sued this software: http://www.carstereo.com/help/Articles.cfm?id=31
    Xmax=13.5mm, the minimum port area=22.19"^2 and mine is:22.746
    Yes 1.69ft^3 then subtract the port displacment of 0.48 you now get 1.21. Now unless the supplied dimmensions were internal dimmensions measuring in from the port the box is 1.21.

    The problem with the port is the end section. It needs a clearance of at least 1 and 1/2 the width of the port. so the end of the port needs to be at least 2.5" away from the back wall.



    Quote Originally Posted by Scoobydoo View Post
    Before poking fun at others at least learn to spell. I won't go into all the gammar mistakes!
    Irony?

    Quote Originally Posted by audioholic View Post
    Your sig... Im trying to figure out if you think he spelled grammar wrong. Because, he didn't. Irony indeed.

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    Re: Please take a look at my box

    Quote Originally Posted by DIGIDIGIBOMBO
    AHhhh dude the box dimensions are the inner dimensions not the outer, maybe u missunderstud me
    I know they are internal. Are they the internal box dimmensions measuring from the box walls or the port walls?



    Quote Originally Posted by Scoobydoo View Post
    Before poking fun at others at least learn to spell. I won't go into all the gammar mistakes!
    Irony?

    Quote Originally Posted by audioholic View Post
    Your sig... Im trying to figure out if you think he spelled grammar wrong. Because, he didn't. Irony indeed.

  12. #12
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    Re: Please take a look at my box

    Inner dimensions measured from the inner box walls. I am gonna put a good pic to scale now




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    Re: Please take a look at my box

    Quote Originally Posted by DIGIDIGIBOMBO
    Inner dimensions measured from the inner box walls. I am gonna put a good pic to scale now
    That will help understand your dimensions a bit. It sounds like you did not subtract port displacement if you measured from the box inner wall. The port is taking up space inside that box. Also the port building material of .75" I presume...



    Quote Originally Posted by Scoobydoo View Post
    Before poking fun at others at least learn to spell. I won't go into all the gammar mistakes!
    Irony?

    Quote Originally Posted by audioholic View Post
    Your sig... Im trying to figure out if you think he spelled grammar wrong. Because, he didn't. Irony indeed.

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    Re: Please take a look at my box

    OHHHH ****. I dont wanna throw my box, dunno how to fix it, maybe use external port, but dunno how, **** **** shitttttttttt if i wanna rebuild the box i must do the following:??? 1.7+0.48=2.18ft^3, and then use the same port area22.19"^2 ,length36.1 that the software gave me for a box of 1.7ft^3, right?? thx
    Last edited by DIGIDIGIBOMBO; 11-02-2005 at 01:15 PM.




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    Re: Please take a look at my box

    ..
    Last edited by DIGIDIGIBOMBO; 11-04-2005 at 01:47 PM.




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