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Reload Thread: 1 sub vs 2 subs?

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    Dirtrider4eva's Avatar
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    1 sub vs 2 subs?

    I have 2 15" RE XXX '05 era.
    i have 7.5 cu feet on tap to play with.
    now for IDEAL specs, these each want 8 cu feet.
    but many run this around 3-3.5 tuned to 30-34 hz.
    would i be better off putting two in the enclosure, or 1?
    im looking to maintain their SQ, while still getting loud for what they are.
    will have them on 2k dailly.
    itd be in a hatch, and this box will take up the whole trunk, so itd be subs up, port to cabin.
    the seats will be folded down for the most part.
    would aero ports be best used?
    btw, resonant frequency of the car is 49hz



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    Re: 1 sub vs 2 subs?

    I suggest having the port load off one of the sides of you trunk. Not straight into your cabin.




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    Re: 1 sub vs 2 subs?

    there would be no room for air movement. box would run right along the grey supports for the top tray, (which would be taken out)



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    Re: 1 sub vs 2 subs?

    Quote Originally Posted by Dirtrider4eva View Post
    there would be no room for air movement. box would run right along the grey supports for the top tray, (which would be taken out)

    Even better...




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    Re: 1 sub vs 2 subs?

    For ported? Not really. Ideally 5-6" would be best. Bump



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    Re: 1 sub vs 2 subs?

    I vote one, port close to cone for good coupling.



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    Re: 1 sub vs 2 subs?

    Use one, sell me the other.



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    Re: 1 sub vs 2 subs?

    Where did you come up with the 8 cube number? I thought these were more in the range of 3.5-4.



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    Re: 1 sub vs 2 subs?

    Quote Originally Posted by keep_hope_alive View Post
    I vote one, port close to cone for good coupling.
    Explain this coupling please, I know you know your stuff very well.



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    Re: 1 sub vs 2 subs?

    Quote Originally Posted by brynm View Post
    Where did you come up with the 8 cube number? I thought these were more in the range of 3.5-4.
    If you put them in winisd or call re audio, they will tell you that. Also, I got a d4 and d1, d4 is original soft parts, d1 has new Fi recone.
    Shoot me an offer if ya want on one.
    Has to do with the xbl^2 motor structure. Almost every sub I know with tht motor type likes huge cubic boxes.



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    Re: 1 sub vs 2 subs?

    Quote Originally Posted by Dirtrider4eva View Post
    Explain this coupling please, I know you know your stuff very well.
    A port works by combining the rear wave with the front wave, but after a period of time/distance so the two are in-phase. That is why you gain 3dB.

    Waves combining in-phase is what I call "coupling". If the port and cone are separated by a distance, they will create separate waves with separate centers, the coupling will not be coherent at some frequencies.



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    Re: 1 sub vs 2 subs?

    Quote Originally Posted by keep_hope_alive View Post
    A port works by combining the rear wave with the front wave, but after a period of time/distance so the two are in-phase. That is why you gain 3dB.

    Waves combining in-phase is what I call "coupling". If the port and cone are separated by a distance, they will create separate waves with separate centers, the coupling will not be coherent at some frequencies.
    so ideally, the woofer should be right over/closest to the ports outlet or inlet?



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    Re: 1 sub vs 2 subs?

    Quote Originally Posted by Dirtrider4eva View Post
    so ideally, the woofer should be right over/closest to the ports outlet or inlet?
    yep.

    boxes with ports on different faces are missing the point entirely, IMO



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    Re: 1 sub vs 2 subs?

    Quote Originally Posted by keep_hope_alive View Post
    yep.

    boxes with ports on different faces are missing the point entirely, IMO
    By this you mean sub up port to the rear or sub back port to the side? Or do you mean a box with multiple ports that fire to both sides?



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    Re: 1 sub vs 2 subs?

    Quote Originally Posted by kushy_dreams View Post
    By this you mean sub up port to the rear or sub back port to the side? Or do you mean a box with multiple ports that fire to both sides?
    Yes to all.



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