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    Box for 4 SA-8's

    ok i want to buy 4 SA-8's to put in my dodge dakota extented cab, they will be run off a AQ2200

    now im not very good at box designing so i wanted to confirm/ask opinions on this box

    it will be 3.2 cubes (roughly .8 cubes per sub) with 2 4" aero's with a length of 14.35 inches each, that should make it tuned to 35hz.

    does that box sound good? if not feel free to give advice on this box. Thanks!







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    Re: Box for 4 SA-8's

    Depends on who you ask...I'd say too little port area





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    Re: Box for 4 SA-8's

    what do you suggest i do for aeros then? im not really sure, i was just taking a stab in the dark on this one.

    i forgot to add, this will be daily driven, id like to have it sound as good as possible on all types of music, from rap/hip hop to metal




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    Re: Box for 4 SA-8's

    I'd do 4 of those ports



    Bought from: tc3k101, vitveet, chico305, pieper88, Toxic Tuan, rusty_armadillo, tristanmay
    Traded with: modskwod, jmkanek
    Sold to: smd4life, AQHDC3, fastfocus00

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    Re: Box for 4 SA-8's

    I also hope you took into account the subs airspace along with ports, pretty big subs. should sound really good though with your airspace/tuning and proper port area.



    Bought from: tc3k101, vitveet, chico305, pieper88, Toxic Tuan, rusty_armadillo, tristanmay
    Traded with: modskwod, jmkanek
    Sold to: smd4life, AQHDC3, fastfocus00

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    Re: Box for 4 SA-8's

    yeah i took into account of sub displacement, i figured about .1 cube per sub, overall the box should be roughly 3.7 cubes before displacement.

    you think i should do 4 4" aeros? wow that seems like alot. that would make the aero's 31.63 inches long though, thats far too long

    well honestly im using this calc http://www.carstereo.com/help/Articles.cfm?id=31 so when i type in the enclosure volume i should be typing in the cubic feet after displacements correct?




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    Re: Box for 4 SA-8's

    seems like a lot but it's what needs to be. You might be safe with 3, personally i'd run 4. this sub moves some air.



    Bought from: tc3k101, vitveet, chico305, pieper88, Toxic Tuan, rusty_armadillo, tristanmay
    Traded with: modskwod, jmkanek
    Sold to: smd4life, AQHDC3, fastfocus00

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    Re: Box for 4 SA-8's

    ok so if i do a 3.2 cube box (after displacements) and use 4 4" aeros, the calc is telling me i need to make the aero's 31.63 inches long, and i just dont have the room for that and i would rather not have the ports outside the box. hmm im at a loss of what to do.




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    Re: Box for 4 SA-8's

    try 3, would be better than 2.



    Bought from: tc3k101, vitveet, chico305, pieper88, Toxic Tuan, rusty_armadillo, tristanmay
    Traded with: modskwod, jmkanek
    Sold to: smd4life, AQHDC3, fastfocus00

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    Re: Box for 4 SA-8's

    hmm even for 3 4" aeros it would need to be 22" long for a 35hz tuning. i wish i was better at this, this is only my second time designing/building a ported box




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    Re: Box for 4 SA-8's

    Aeros are tricky like that. To achieve anywhere close to daily/low tuning and maintain "proper" port area length is CRAZY.

    PSP Flared Aeros help with the flares. Though still hard to judge. One 12-14 of port area via PSP Aero for ~ 2 liters of Displacement seems to work well for me so far.



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    Sounds good.

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    Re: Box for 4 SA-8's

    i had the same problem, had to tune to 37hz, sometimes space can be a challenge. only fix would be passive radiators but unless money is not of limit, i'd say try a higher tuning.



    Bought from: tc3k101, vitveet, chico305, pieper88, Toxic Tuan, rusty_armadillo, tristanmay
    Traded with: modskwod, jmkanek
    Sold to: smd4life, AQHDC3, fastfocus00

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    Re: Box for 4 SA-8's

    hmm yeah, right now i have an AQ sdc2.5 tuned to 38hz, i like the way that sounds, so i might try tuning to that again, i just wanted to try something different.




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    Re: Box for 4 SA-8's

    Quote Originally Posted by Dodgedakotafan View Post
    hmm i may just go with a slot port design, seems simpler unless i can figure something out with these aeros
    Have SD and Xmax on the SA-8's? Can't recall them.

    SD (in CM^2) * XMAX (in CM) * 2 / 1000= Displacement in Liters.

    1 4" Aero has 12.56 port area.
    2 4" Aeros have 25.12 port area
    3 3" Aeros have 21.195 port area.

    Those would be your best bets depending on liters of displacement.



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    Re: Box for 4 SA-8's

    can't expect them to sound the same even at the same tuning. maybe try using 3 subs and 2 ports.



    Bought from: tc3k101, vitveet, chico305, pieper88, Toxic Tuan, rusty_armadillo, tristanmay
    Traded with: modskwod, jmkanek
    Sold to: smd4life, AQHDC3, fastfocus00

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