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    need box advice

    WHATS UP GUYS I GOT AN ATOMIC 18'' APXX. THAT I WILL BE PUTTING IN MY 02 YUKON. I WILL BE POWERING IT WITH AN AQ2200. I NEED TO KNOW HOW BIG OF A BOX DO I NEED SO I MY TRUCK CAN BE SLAMMIN. I HAD THE SUB A IN 6cu box before tuned to 35hz. in my trailblazer and it was hitting hard. now that i have a bigger vehicle. im thinking i need a bigger box.. i need some advice guys please







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    Re: need box advice

    Quote Originally Posted by tonyrms View Post
    WHATS UP GUYS I GOT AN ATOMIC 18'' APXX. THAT I WILL BE PUTTING IN MY 02 YUKON. I WILL BE POWERING IT WITH AN AQ2200. I NEED TO KNOW HOW BIG OF A BOX DO I NEED SO I MY TRUCK CAN BE SLAMMIN. I HAD THE SUB A IN 6cu box before tuned to 35hz. in my trailblazer and it was hitting hard. now that i have a bigger vehicle. im thinking i need a bigger box.. i need some advice guys please
    I just happen to see this a second ago and wanted to let you know, if you want me to do something for you, you can PM me if you like. Thank you!





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    Re: need box advice

    i can build it just not good w/ numbers




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    Re: need box advice

    Quote Originally Posted by tonyrms View Post
    i can build it just not good w/ numbers
    Do you want just a design done? Then you can do the build for it?





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    Re: need box advice

    i have a design... just need to know what size my box needs to be so it can perform good. i had a 6cu box at 35hz. now that i have a bigger vehicle will the box need to be bigger




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    Re: need box advice

    Depends on what you're trying to accomplish. If you're looking for more output and couldn't push the sub past it's limits with the 6ft^3 box, then using a larger one will lower the mechanical power handling of the sub(allowing it to be pushed further with the same amount of power) and increase the efficiency of the box(louder on the same power vs. a smaller box).

    What exactly are you wanting to improve on with the new box? Do you feel as though your output is lacking in a certain hz range?



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    Re: need box advice

    i want a louder sound... my previous box was 6cuft @ 35z and i had a 2608bxi on it. this time it will be the same sub with an aq2200d.




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    Re: need box advice

    Again, adding to what RAM said, it still depends on more detailed factors, which is why I offered to do a design for you. It seems as though you have a general idea of what you want, but your explanation is general as well. Here are a few Qs for you. Do you want more numerical loud, or intensity type loud or a good mix ? Are you shooting for a specific frequency range? Is the 35Hz still desired as a tuning or lower or higher? This is needed as the compression of the design will help the port in determining that desired tuning.
    Now, though efficiency may increase with a larger design, this is true only for the lower frequency range around your tuning unless proper coupling of the port is controlled more for a broader range of efficiency for even higher frequencies. The design will likely be sensitive to higher power with higher frequencies above the tuning more so than below, so it may true that a larger design, if possible, be implimented to keep it from killing the highs and dropping fast below cutoff. But this also raises the concern of passband width as for most designs to be more efficient, they have to be optimized for the vehicles desired frequency response, and unless it is a fairly large vehicle, the tunung low cutoff may reside around the low to high 40hz range for quarter wave cutoff, and around the 90Hz range for actual high end, low impedance true efficiency when loading is attrubuted. So, tuning lower may not be good in that sense, where actually a smaller design may couple it better to the vehicle. But that would depend on what the vehicle will tell you it likes for a response. For example, my compact SUV enjoys a perfect response from 31Hz-125Hz as the trunk space is part of the cabin compression area, so lower tuning optimized for around halfwave of 62Hz will do some damage to an spl meter. And if utilizing quarterwave cutoff, will get remarkably low down to around 17Hz with the 31Hz cutoff. So, its all about details in what you desire. This, to me, needs to be known before applying any kind of box volume gueasstimate of actual desired loudness, as it may be different perspective between spl metering and just plain loud. There is a tradeoff, and that tradeoff needs to be known before any design is implimented.





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