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  1. #16
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    Re: Poorly designed 4th order

    And if you are wondering why I had so much rise, it was a 5:1 4th with 113in^2 of port area, it was ridiculously efficient.



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    Re: Poorly designed 4th order

    Quote Originally Posted by RangerDangerV2 View Post
    And if you are wondering why I had so much rise, it was a 5:1 4th with 113in^2 of port area, it was ridiculously efficient.
    Didn't know this would become an argument lmao.




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    Re: Poorly designed 4th order

    Quote Originally Posted by 4bannger View Post
    Didn't know this would become an argument lmao.
    It's ca.com



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    Re: Poorly designed 4th order

    So your saying that if i make 4 cubes sealed and since i have to divide the chamber each sub would get 2 cubes, and then a 4 cube ported section?
    yes



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    Re: Poorly designed 4th order

    Quote Originally Posted by RangerDangerV2 View Post
    And if you are wondering why I had so much rise, it was a 5:1 4th with 113in^2 of port area, it was ridiculously efficient.

    Just setting the record straight that you were essentially running 4K




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    Re: Poorly designed 4th order

    Quote Originally Posted by Beatin' View Post
    yes
    so the 1:1 ratio isnt the problem it was the amount of space i was using? would i be better off doing a ported box as far as it being louder?




  8. #22
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    Re: Poorly designed 4th order

    yes overall the box is way too large I would have went with something like 1:1.5 basically 4 sealed and 6 cubes ported tuned around 60hz should do nice but I am not a 4th order king just done a ton of reading and from my understanding the larger the ratio the larger and faster the roll off is basically becoming a 1 note wonder now a ported box will get the job done but if ya want something different a 4th order can be real nice and impressive. you also have to be real careful on the port area it cant be real large.



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    Re: Poorly designed 4th order

    Quote Originally Posted by dbeez View Post
    yes overall the box is way too large I would have went with something like 1:1.5 basically 4 sealed and 6 cubes ported tuned around 60hz should do nice but I am not a 4th order king just done a ton of reading and from my understanding the larger the ratio the larger and faster the roll off is basically becoming a 1 note wonder now a ported box will get the job done but if ya want something different a 4th order can be real nice and impressive. you also have to be real careful on the port area it cant be real large.
    what kind of port area should i shoot for? im still undecided if i wanna go with a 4th or ported for my next box build




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    Re: Poorly designed 4th order

    From my understanding is 1/2 your cone area



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    Re: Poorly designed 4th order

    Quote Originally Posted by 4bannger View Post
    what kind of port area should i shoot for? im still undecided if i wanna go with a 4th or ported for my next box build
    You wont know until you build it. I would build a sealed box with a qtc of .707, find the resonance, do a 1:3 ratio ratio and use 1/2 cone area amount of port area tuned to the sealed resonance and just see how it sounds. To peaky, shrink the front, doesnt play low enough, tune the port lower, isnt loud enough, up the port area, subs unload to easy, make a loading wall. Once boxes are in the car its all testing, why do you think all the big 4th order builds have multiple test vids with no port and differnt ports? Its all about testing. Just make it to where the front can be totally changed and just goof with it.

    Thats what it is all about lol



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    Re: Poorly designed 4th order

    1. Get your sealed Fc around 45-55 (depending on goals)
    2. Tune to or around Fc
    3. 2:1 or higher ratio for output, 1.5ish or less if you don't care if you lose a dB or two

    40Hz is just too low for a 4th order, plus your ratio was too small. If you don't know what you're doing, a ported box is a lot easier to get right



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    Re: Poorly designed 4th order

    Quote Originally Posted by SounDrive View Post
    1. Get your sealed Fc around 45-55 (depending on goals)
    2. Tune to or around Fc
    3. 2:1 or higher ratio for output, 1.5ish or less if you don't care if you lose a dB or two

    40Hz is just too low for a 4th order, plus your ratio was too small. If you don't know what you're doing, a ported box is a lot easier to get right
    Well i was thinking about just going with a ported box. I've mad a few designs can you tell me if any of these would be a good design for a ported box?

    -I'm not sure how good down-fire boxes work so this is just a concept for a box. is there any special things that a down-fire box needs different than a ported?
    Poorly designed 4th order-downfire5.jpgPoorly designed 4th order-downfire4.jpgPoorly designed 4th order-downfire.jpg

    -This is a ported box i was thinking about. The angled piece on the top is just a concept of an amp rack with plexi glass and the holes in the back are for cooling fans.
    Poorly designed 4th order-ported1.jpgPoorly designed 4th order-ported2.jpgPoorly designed 4th order-ported3.jpg
    Attached Thumbnails Attached Thumbnails Poorly designed 4th order-downfire3.png   Poorly designed 4th order-downfire2.jpg  




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    Re: Poorly designed 4th order

    Quote Originally Posted by hispls View Post
    Just setting the record straight that you were essentially running 4K
    yeah? so are you trying to say that my woofers were actually getting 4kw? No, they were not. I would think that you of all people would understand this.



    1999 Tahoe
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    Re: Poorly designed 4th order

    Quote Originally Posted by RangerDangerV2 View Post
    yeah? so are you trying to say that my woofers were actually getting 4kw? No, they were not. I would think that you of all people would understand this.
    I understand, but your claim is a bit misleading and you know it.




  16. #30
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    Re: Poorly designed 4th order

    Quote Originally Posted by RangerDangerV2 View Post
    yeah? so are you trying to say that my woofers were actually getting 4kw? No, they were not. I would think that you of all people would understand this.
    Quote Originally Posted by hispls View Post
    I understand, but your claim is a bit misleading and you know it.
    more help less argue please




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