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2 subs in one box, or 2 subs in 2 boxes

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  • 2 subs in one box, or 2 subs in 2 boxes

    Does anybody know any audible difference between having 2 subs in a single box vs 2 boxes with 1 sub per box?

  • #2
    all things being equal there isn't a difference.... problem is rarely are all things equal.... the subs will be independant of each other in two seperate enclosures... which is a good thing....

    slight power differences wont affect each other.... if one blows it won't affect the air volume to the other, if there both in the same chamber & 1 blows the other will now not have any suspension & is more likely to blow or be damaged also..... keep them seperate
    MY NEWEST INSTALL:modded infiniti fx with big screen

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    • #3
      I have two subs in one box with a divider... so its really your own choice, but make them independant of eachother.
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      • #4
        in one box with a divider is equal to two boxes.... as long as the chambers are seperated & sealed off from each other that is......
        MY NEWEST INSTALL:modded infiniti fx with big screen

        first windows carpc install........my liquid cooled LVDS screen :D

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        • #5
          There is no advantage to having seperate boxes. It just complicates wireing and ends up taking up more space than a single.

          You failed to mention how you were going to wire the subs. Parallel, Series, single ended?

          Perhaps the only time seperate enclosures are a benfit is when you are going to use two dissimilar subs. The loudest systems out there all use common chamber vented boxes. If you are into SQ then a split chamber sealed box may be the way to go.

          Save your self a headache and keep em in the same box.

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          • #6
            Originally posted by accentsound
            There is no advantage to having seperate boxes.
            the center piece is a brace. otherwise, id agree.

            since I brace my boxes as a general rule, I too would recommend a single chamber box.

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            • #7
              alright thanks

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              • #8
                I don't see how dividing one box in two affects space or wiring significanly at all...... I do know that if you blow a sub with them sealed from each other the blown one will not affect the other, while in a common chamber a blown sub will defanatley affect the other to the point it will be unusable.

                if both subs are equal & being feed an equal mono signal, then I will agree there is no difference.... but there are more benifits to seperated than not....

                I blew a sub once & ran the system for 6 months on one sub...... sounded great.... just down 3db in volume, but otherwise very o.k.

                you could never do that with a common chamber.... is that a benifit?
                MY NEWEST INSTALL:modded infiniti fx with big screen

                first windows carpc install........my liquid cooled LVDS screen :D

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                • #9
                  stupid question, what is the benifit of not seperating?
                  MY NEWEST INSTALL:modded infiniti fx with big screen

                  first windows carpc install........my liquid cooled LVDS screen :D

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                  • #10
                    Originally posted by turbocad6
                    stupid question, what is the benifit of not seperating?
                    for odd shaped enclosures or even trapezoidal boxes, its way, way easier not to separate.

                    for beginning woodworkers, its easier to not have to think about the seperate chamber when drawing a cutting diagram.

                    for beginning woodworkers who have no tablesaw, it especially adds complexity. compared to no center divider.

                    as far as blowing a subwoofer, I have to admit, you are the first person I've ever read who recomends that reasoning to back it up with an example. Personally, I think keeping that box in there with one good subwoofer is ghetto. I think the better answer is to not blow the subwoofer to begin with. In my experience, folks blow both at the same time or the amp. Or something that eliminates all the performance, not just half. I think a poll across a car audio forum would show a much higher frequency of getting fully shut down rather than a single woofer failure.

                    but to reiterate, I think the name of the game between seperating and not seperating is "easy". But I think a gentleman before me said it best:

                    Originally posted by turbocad6
                    all things being equal there isn't a difference....
                    he was right!

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                    • #11
                      did you ever stop to think that if you blow both subs that had they been seperated only one would have blown? when the first one goes the second one looses all it's suspension if they share there space.... at the same conditions that caused the first to blow the second is only seconds behind in it's shared fate....I have never blown two subs at the same time, but I have blown a few subs
                      MY NEWEST INSTALL:modded infiniti fx with big screen

                      first windows carpc install........my liquid cooled LVDS screen :D

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                      • #12
                        if anyone has ever used a high-end RTA, shared-chamber means you need to run mono. You would have less clean separation (i.e. Left-Right). if you are into SQ, you SHOULD separate the chambers. If needed, two sep. boxes only takes up an inch or two.

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                        • #13
                          I can't imagine anyone having the ability to calculate & build an enclosure not having the ability to also divide it, but stereo seperation wouldn't be a factor for two subs located in a trunk or rear of vehicle...these will be cut off low enough that there should be no audiable localization, meaning you'd never be able to distinguish left from right anyway......

                          the only time it may be remotely acceptable to me to use a common chamber is if both subs are run off a single channel.... even then I'd rather seperate for reasons already stated, but if the subs are run off two different channels it should be considered a performance advantage to seperate..... it's 1 extra divider that will also stiffen the enclosure, I still see no reason not to.... & several advantages in doing so.......
                          MY NEWEST INSTALL:modded infiniti fx with big screen

                          first windows carpc install........my liquid cooled LVDS screen :D

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                          • #14
                            audio has a strong point, but it does come down to wiring. Running speakers in series has a cross-over effect due to the speaker itself... Think about it. What is a speaker but a great big coil. Coils in series are the beginning of a crossover. This means that the first speaker in the chain will slightly modify the signal heading to the second speaker, etc etc etc.

                            The same holds true theortetically for speakers in parallel, but thats a joke statement.

                            So yes, if you ran in series, I would advise seperate enclosures. If you ran in stereo i would advise seperate enclosures and unless you are confident that each speaker has the exact same dampening charecteristics, I would run in seperate enclosures. Do i think you could tell the difference? Nope

                            The point of a blown woofer does make sense. Maybe a manufacturing defect, or a blown channel on the amp caused a DC spike. With seperate enclosures you would still be up and running.
                            Take my advice: Do not try to build a system that includes EVERY feature. Start with the basics, build it to a bug free state, and THEN add on.

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                            • #15
                              I really can't tell any difference between the two versions...maybe with high end systems it indeed makes a difference.

                              In terms of wirring and woodwork, I find it as easy either way...
                              When I build 2 sub enclosures with a mono amp out of wood, I usually make separate boxes and place the amp in between the two, recessed. Looks good beeter, than just bolting the amp on the enclosure, with all the wirring in sight...
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