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  1. #136
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    Re: The 4th order thread

    Quote Originally Posted by RangerDangerV2 View Post
    and the sucky part is, ive been testing music all day, because I cant find any 0db tones lol, im sure burps will gain me too
    Not sure if someone said this yet. You can create your own 0db tones on audacity for any length of time in any format; lose less, mp3 or wav. Sorry if was answered within next pages.



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  2. #137
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    Re: The 4th order thread

    Quote Originally Posted by thatguy12 View Post
    Not sure if someone said this yet. You can create your own 0db tones on audacity for any length of time in any format; lose less, mp3 or wav. Sorry if was answered within next pages.
    already have everything I need. thanks though



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  3. #138
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    Re: The 4th order thread

    Ok I am picking up a pair of Sundown z v.3 18's. How do they preform in a 4th order or would I be better off with something else? Will be running approximately 4k to them in a explorer sport 2 door. I have a space of about 48 wide 25 height and 30 depth so right at 20cuft. am trying to stay in cargo area behind rear seats until I can talk my wife into letting me build a wall.



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    Re: The 4th order thread

    Quote Originally Posted by gumby688 View Post
    Ok I am picking up a pair of Sundown z v.3 18's. How do they preform in a 4th order or would I be better off with something else? Will be running approximately 4k to them in a explorer sport 2 door. I have a space of about 48 wide 25 height and 30 depth so right at 20cuft. am trying to stay in cargo area behind rear seats until I can talk my wife into letting me build a wall.
    read the first few pages, run some numbers and see lol



    1999 Tahoe
    2 sa12s
    4th order
    145.18 @33z... with less than 500 watts!

  5. #140
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    Re: The 4th order thread

    Quote Originally Posted by gumby688 View Post
    Ok I am picking up a pair of Sundown z v.3 18's. How do they preform in a 4th order or would I be better off with something else? Will be running approximately 4k to them in a explorer sport 2 door. I have a space of about 48 wide 25 height and 30 depth so right at 20cuft. am trying to stay in cargo area behind rear seats until I can talk my wife into letting me build a wall.
    A friend has two Zv3 18s on a SAZ4500 in a 4th order and he does a 154/155ish



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    Most properly done 15 inch subwoofers are not suited for car audio use simply due to box size requirements.

  6. #141
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    Re: The 4th order thread

    Quote Originally Posted by IonRL205 View Post
    A friend has two Zv3 18s on a SAZ4500 in a 4th order and he does a 154/155ish
    Any idea what ratio he is using?



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    Re: The 4th order thread

    Quote Originally Posted by gumby688 View Post
    Any idea what ratio he is using?
    No idea, not sure if he knows either lol

    he bought the car from the guy on youtube a21bravo. You could ask him what the ratio was



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    Quote Originally Posted by zako View Post
    Most properly done 15 inch subwoofers are not suited for car audio use simply due to box size requirements.

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    Re: The 4th order thread

    I'm thinking about getting 2 SA12's and I ran some numbers for my vehicle. I have 4.52 cubic feet available which is 127.99 l.
    So, 27.66 l / 127.99= .21611......+1= 1.21611, square root of that =1.102, x the Fs of the woofer (32.97) comes to an FC of 36.3.
    Where do I go from here?

    P.S. I got the t/s parameters from what PWK extracted from the sub



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  9. #144
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    Re: The 4th order thread

    Quote Originally Posted by Nut Hair Trick View Post
    I'm thinking about getting 2 SA12's and I ran some numbers for my vehicle. I have 4.52 cubic feet available which is 127.99 l.
    So, 27.66 l / 127.99= .21611......+1= 1.21611, square root of that =1.102, x the Fs of the woofer (32.97) comes to an FC of 36.3.
    Where do I go from here?

    P.S. I got the t/s parameters from what PWK extracted from the sub
    too low of an Fc IMO. get it to around 45-50



    1999 Tahoe
    2 sa12s
    4th order
    145.18 @33z... with less than 500 watts!

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    Re: The 4th order thread

    Should I have used the whole available space on the equation or broke down the box to a 2:1 ratio, and used the liters from the 1 for the equation?

    ---------- Post added at 10:43 AM ---------- Previous post was at 10:43 AM ----------

    I used total available space



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  11. #146
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    Re: The 4th order thread

    Quote Originally Posted by Nut Hair Trick View Post
    I'm thinking about getting 2 SA12's and I ran some numbers for my vehicle. I have 4.52 cubic feet available which is 127.99 l.
    So, 27.66 l / 127.99= .21611......+1= 1.21611, square root of that =1.102, x the Fs of the woofer (32.97) comes to an FC of 36.3.
    Where do I go from here?

    P.S. I got the t/s parameters from what PWK extracted from the sub
    and you are doing that wrong it seems. you divide the vas by the sealed chamber volume, not total volume that you have. but ill make this easy for you. give each of the sa12s 1 cu ft sealed. that is the best for them.



    1999 Tahoe
    2 sa12s
    4th order
    145.18 @33z... with less than 500 watts!

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    Re: The 4th order thread

    Awesome, thanks. Makes sense



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  13. #148
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    Re: The 4th order thread

    Would Fi SSDs be good in a 4th order?



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    Re: The 4th order thread

    Quote Originally Posted by OldManBass View Post
    Would Fi SSDs be good in a 4th order?
    run the numbers and see...



    1999 Tahoe
    2 sa12s
    4th order
    145.18 @33z... with less than 500 watts!

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    Re: The 4th order thread

    A true 2:1 ratio of my available space of 127.99 would be 42.66l (1.5 cuft) and gives me an FC of 42.32
    If I used 2cuft for the 2 sa12s or 56.63l for the sealed chamber, I get an Fc of 40.22.

    The smaller Sealed chamber gave me a higher Fc. I tried it again with both volumes using the T/s parameters on SSA's site and I got much lower FC's 39.6 (42.66l or 1.5 cuft) and 37.155 (56.63l or 2 cuft). I can not access the sundown site because it asks me for a password. The only T/s parameters I can trust right now is that of what Pete extracted. I know this may sound dumb, but would the T/s parameters that I have access to change due to me using (2) D4 Sa12's?



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