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Reload Thread: 2 12's Ported or 2 15's Sealed

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    azphat12's Avatar
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    2 12's Ported or 2 15's Sealed

    I just bought a new car and need to redo my subs and enclosure.

    Here is my question..

    I have a 1250 watt @ 1ohm Rockford Fosgate T1000bd

    With my 1250 watts what would be better....

    2 12's in a ported box around 3.5 cu ft

    or

    2 15's in a sealed box around 5 cu ft.

    I am planning on getting SA 12's or SA 15's. Just wondering which would be best. Both speakers are rated at 600rms. I am sure they can take more, and maybe down the road I can get another amp. But for now I have the Fosgate T1000bd to work with.

    If the recommendations are for the ported. Anyone have a basic box layout? I built one for my Explorer, but the height is too much for the trunk.

    I was thinking something similar to
    SQP212 - Ground Shaker 12" Dual Ported Box

    # 12" Dual Ported Box
    # 3/4" MDF Construction
    # Volume: 1.8 cu. ft. Per Chamber
    # Width: 32"
    # Height: 13.5"
    # Depth: 19.25

    But I would build it myself. If those are good for the SA12's then all I would need to know is where to add some in order to get some bracing in there and maintain the cu ft.

    I am looking to make this move around February when taxes get here...if the gov is still giving taxes, lol.

    Thanks for any help. I really do appreciate it!
    I will be searching to see if I can get any answers that way as well.







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    Re: 2 12's Ported or 2 15's Sealed

    Well....looking around maybe even the SA12's in a sealed box? I listen to all types of music. Rock, Rap, Metal, Bass.
    When I have subs in I probably listen to Rap/Bass 70% and Rock/Metal 30%. If that would alter anyones opinion as to which setup would be the best.
    I am staying with Sundown SA subs though.

    Also, I am not looking for SPL. I want these to get loud, but not sound like crap doing it.




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    Re: 2 12's Ported or 2 15's Sealed

    12s in ported box in most cases. I would also do one larger port instead of two smaller port.




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    Re: 2 12's Ported or 2 15's Sealed

    That is what I did on my current box. Why would you recommend 1 port?




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    Re: 2 12's Ported or 2 15's Sealed

    Quote Originally Posted by azphat12 View Post
    That is what I did on my current box. Why would you recommend 1 port?
    More efficient than two smaller ports and takes up less box volume.



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    Re: 2 12's Ported or 2 15's Sealed

    Pair of SA12's, 3.5ft^3 at 30hz.



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    Re: 2 12's Ported or 2 15's Sealed

    Here is what I came up with....
    Can anyone tell me if this would be accurate for 3.5 @ 30hz.

    Wood = .75

    W = 36
    H = 15
    D = 18

    Port 1 = Length 14.25
    Port 1 = Width 3

    Port 2 = Length 7

    Total port length 26.5

    It shows this would be 3.8 @ 29.99

    Figure with some bracing that would come down closer to 3.5?




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    Re: 2 12's Ported or 2 15's Sealed

    If your using 6by6's for bracing then ya it would take you down about 0.3 cubes. I couldn't imagine bracing taking up more than 0.1 cubes. So I would say more around 3.7.

    That is unless you factored in the displacement of the drivers and that's how you got 3.5, then yes 3.5 would sound about right.




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    Re: 2 12's Ported or 2 15's Sealed

    Actually I do not think the displacement was calculated.




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