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    Some info in the difference between boxes

    Well, some kids wonder "ZOMG, WHAT BOX SHULD I USE?!?!?! IZ PORTED TEH BEST?!"

    Well, I used WinISD Alpha, I used a pair of Audiopipe TXX-15 drivers, with default specs.

    Here are said specs:

    Sealed:
    7.341 cuft

    Ported (AKA Vented):
    15.748 cuft
    tuned to 22.97 Hz

    4th order Bandpass:
    Rear chamber: 6.987 cuft
    Front chamber: 4.179 cuft tned to 40.99 hz

    6th order Bandpass:
    Rear Chamber: 3.531 cuFt tuned to 20hz
    Front Chamber: .925 cuFt tuned to 63.46 Hz

    Passive Radiator:
    7.341 cuFt using a 12" Passive Radiator from Parts-Express



    Now, the color chart:
    Sealed: Yellow
    Ported (Vented): Grey
    4th Order Bandpass: Orange
    6th order bandpass: White
    Passive Radiator: Purple (It could be pink.. I'm kind of color blind)




    For your hard-core people out there, this was done in WinISD @ 85* F, 75% humidity, and 101.325 Pa...

    Please note:: As you alter the tuning frequency on vented boxes, it becomes more "peaky", and won't roll off that flat. This goes the same for the bandpass boxes, as well. If I changed the 6th order bandpass box so the front chamber is tuned to 100hz, the whole line shifts and it has nearly the same response as sealed/vented/passive radiator in the 40-50hz range, and peaks really high in the 100hz range.


    Now, with that said, and the chart shown, note, this is just Db gains based on a computer model, and does not include the car's involvement...
    As most will tell you, it all depends on your car and your application.

    But, I just decided to put this together real quick to show each box's relationship to each other in perfect conditions.



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    Re: Some info in the difference between boxes

    this is not saying much. This type of test is driver dependent.



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    Re: Some info in the difference between boxes

    Quote Originally Posted by Trey803 View Post
    this is completely relative to the drivers being used
    Yeah. I know. That's why I labeled the drivers. Like I said, it's just a relation based on the drivers I used.



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    Re: Some info in the difference between boxes

    interesting... would have guessed the 4th and 6th would have higher peaks than the rest



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    Re: Some info in the difference between boxes

    Since Trey pointed out a very good point, I decided to do another "test" with a pair of IDQ10's. I used these drivers 'cause someone I know is ugnna make a build with them soon, so I thought, kill two birds with one stone...
    I also made the lines thicker so it's easier to read.

    Color chart is the same:
    Sealed: Yellow
    Ported (Vented): Grey
    4th Order Bandpass: Orange
    6th order bandpass: White
    Passive Radiator: Purple (It could be pink.. I'm kind of color blind)




    Now, the specifications of the boxes:

    Sealed:
    2.428 cuFt

    Vented:
    3.982 CuFt @ 24.5 Hz

    4th Order BP:
    Rear Chamber: 2.343 CuFt
    Front Chamber: 1.792 CuFt @ 50.53 Hz

    6th Order BP:
    Rear Chamber: 3.531 CuFt @ 20 Hz
    Front Chamber: .925 CuFt @ 63.46 Hz

    Passive Radiator [Using the same Passive Radiator as the first "Test"]
    2.285 @ 30.36hz




    Like Trey said, it is really determinant on the driver.



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    Re: Some info in the difference between boxes

    this is pretty useless information




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    Re: Some info in the difference between boxes

    Quote Originally Posted by Rashaddd View Post
    this is pretty useless information
    Not really. It shows each box's relationship to each other in terms of DB output. The IDQ10 is pretty good all around, I could do some other drivers if you want. Most of the time it's the same results as the first chart.



    Now designing / building boxes.
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    PM me.

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    Refs: MSW Danny, atsaubrey (great seller), ampjunkielikeme, wgsj_fortvalley, tEh koRnDog, bad @SS chevy, Nismos14 (who is the man. )



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    Re: Some info in the difference between boxes

    Quote Originally Posted by IDSkoT View Post
    Not really. It shows each box's relationship to each other in terms of DB output. The IDQ10 is pretty good all around, I could do some other drivers if you want. Most of the time it's the same results as the first chart.
    It would be much more beneficial to explain their relationships and potential advantages. With this, the stupid people are going to look at it and pick the curve they like most, and conclude that is the best kind of box for their goals. The smart people will realize it is useless, and most already have a much more solid foundation of knowledge in terms of the differences between the box types.

    The people inbetween don't exist because this is CA.com




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    Re: Some info in the difference between boxes

    its useless because that has nothing to do with car audio. it just models a drivers output and proformace in ideal situations which cars are not, each having different cabain gain etc...



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    Re: Some info in the difference between boxes

    also your average person does not care where the roll off occurs, they just want a Chebyshev allignment and max output...



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    Re: Some info in the difference between boxes

    Quote Originally Posted by snb778 View Post
    interesting... would have guessed the 4th and 6th would have higher peaks than the rest
    That's just the frequency response of the transfer function. The actual peak output of each enclosure will differ quite a bit. Each enclosure has a different efficiency to it and those graphs don't factor in sensitivity (and neither do the SPL graphs winisd will give you).



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    Re: Some info in the difference between boxes

    do not.... I repeat...DO NOT build a bandpass box based on the estimated frequency reponse of winisd. It will not sound right Don't ask how I know



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