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    4th Order Wall Design Help Needed

    I have been building systems for about 16 years I just never have built or messed with a 4th order.but i have decided no better time than now! so here is my info....

    Purpose: street beat I want to do demos and do street beat in usaci so my goal is to do 160+ on music @47hz for 30 seconds at a time. I say 47hz because my truck peaks at 45 and 47hz is the track i have to use for street beat.

    equipment: I have 4-12" B2 XC's being powered by 2-B2 M1's I could swap out to 15's but would like to stay with the 12's if my goal is attainable with them.

    space: I have a 2005 Nissan Xterra that i can do anything with, my demensions are roughly 40"wide 36"tall 40" deep
    i can go bigger but i would like to keep it this size or smaller to be able to remove the box to try different designs. it has a false floor "base" already installed. also would like to use a large aero port for the front chamber tuning rather than a slot port.

    If you need anymore info just let me know, and if i need to pay you something just let me know.

    B2 XC 12" specs

    Power Handling: 6 kw ~ 15 kw*
    Sensitivity: 86.1 dB
    Nominal Impedance: 1 Ω
    (Re):0.9 Ω
    Resonanse Frequency (Fs): 38.3 Hz
    Vas: 16.51 L
    Qts: 0.331
    Qms: 4.848
    Qes: 0.356
    Voice Coil diameter: 4"

    I have tried to message @80inches but his pm box is full so anybody else have any advice? this is a huge build with some pricey equipment so please only help from guys that have built and have a lot of experience with 4ths please! and thanks in advance for any help!



    2009 CHEVROLET AVALANCHE___2005 NISSAN XTERRA___ 2002 BMW M3
    DECK-DDX319________________CZ702_________________P99RS
    COMP AMP-B2 QUATTRO_______ B2 QUATTRO___________2- B2 QUATTRO
    COMPS-3 SETS B2 6.5'S________ 3-B2 6.5'S_____________TANTRIC 3 WAY
    SUBS- 1- DB DRIVE WD12_______4- TANTRIC SHD 15_____1-TANTRIC LD CARBON 10
    SUB AMPS- 2- B2 ZERO.1________4-B2 M1______________ B2 QUOTTA
    BOUGHT: SAKURA,STEVO13,TEEN,TEAM SOLO,2002XLT,BLACKONBLACK98,HITTIN1,HORNEDFROG1985 ,DBEEZ
    SOLD: STEVO13,MAZZASEC,ECHO42987,l7runner,TEEN,SLAM,




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    nutnbutcustm's Avatar
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    Re: 4th Order Wall Design Help Needed

    87 looks and no replies at all??



    2009 CHEVROLET AVALANCHE___2005 NISSAN XTERRA___ 2002 BMW M3
    DECK-DDX319________________CZ702_________________P99RS
    COMP AMP-B2 QUATTRO_______ B2 QUATTRO___________2- B2 QUATTRO
    COMPS-3 SETS B2 6.5'S________ 3-B2 6.5'S_____________TANTRIC 3 WAY
    SUBS- 1- DB DRIVE WD12_______4- TANTRIC SHD 15_____1-TANTRIC LD CARBON 10
    SUB AMPS- 2- B2 ZERO.1________4-B2 M1______________ B2 QUOTTA
    BOUGHT: SAKURA,STEVO13,TEEN,TEAM SOLO,2002XLT,BLACKONBLACK98,HITTIN1,HORNEDFROG1985 ,DBEEZ
    SOLD: STEVO13,MAZZASEC,ECHO42987,l7runner,TEEN,SLAM,

  3. #3
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    Re: 4th Order Wall Design Help Needed

    I do not see 160s with a 4th... youre only using the front wave and you risk unloding very easily... just do a flat wall.




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    Re: 4th Order Wall Design Help Needed

    they are doing 160+ in italy with only 2 woofers in 4th orders, and yes you can unload if you arent careful but if you test,test and test and get tuning right it can happen.



    2009 CHEVROLET AVALANCHE___2005 NISSAN XTERRA___ 2002 BMW M3
    DECK-DDX319________________CZ702_________________P99RS
    COMP AMP-B2 QUATTRO_______ B2 QUATTRO___________2- B2 QUATTRO
    COMPS-3 SETS B2 6.5'S________ 3-B2 6.5'S_____________TANTRIC 3 WAY
    SUBS- 1- DB DRIVE WD12_______4- TANTRIC SHD 15_____1-TANTRIC LD CARBON 10
    SUB AMPS- 2- B2 ZERO.1________4-B2 M1______________ B2 QUOTTA
    BOUGHT: SAKURA,STEVO13,TEEN,TEAM SOLO,2002XLT,BLACKONBLACK98,HITTIN1,HORNEDFROG1985 ,DBEEZ
    SOLD: STEVO13,MAZZASEC,ECHO42987,l7runner,TEEN,SLAM,

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    Re: 4th Order Wall Design Help Needed

    flat wall is much easier. and it will give you what you are looking for...




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    Re: 4th Order Wall Design Help Needed

    why would a 4th order unload, subs are in a sealed chamber.

    Personally I'd go for cone area, so 15's at the minimum. Flat would be probably be your best bet, but a 4th order could do it also, especially if you build to get a decent bump around your peak...




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    Re: 4th Order Wall Design Help Needed

    A 4th can and will do what you want in that truck. Just don't expect it from the first build or two. If you go for numbers altering port position will alter your numbers drastically. The biggest over all issue will be getting the SPL port to peak with the truck correctly.




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    Re: 4th Order Wall Design Help Needed

    this is why i want to use a aero port for easier adjustability, I have come up with a design i just havent built or designed one before, just looking for someone to either design me one or look over my design



    2009 CHEVROLET AVALANCHE___2005 NISSAN XTERRA___ 2002 BMW M3
    DECK-DDX319________________CZ702_________________P99RS
    COMP AMP-B2 QUATTRO_______ B2 QUATTRO___________2- B2 QUATTRO
    COMPS-3 SETS B2 6.5'S________ 3-B2 6.5'S_____________TANTRIC 3 WAY
    SUBS- 1- DB DRIVE WD12_______4- TANTRIC SHD 15_____1-TANTRIC LD CARBON 10
    SUB AMPS- 2- B2 ZERO.1________4-B2 M1______________ B2 QUOTTA
    BOUGHT: SAKURA,STEVO13,TEEN,TEAM SOLO,2002XLT,BLACKONBLACK98,HITTIN1,HORNEDFROG1985 ,DBEEZ
    SOLD: STEVO13,MAZZASEC,ECHO42987,l7runner,TEEN,SLAM,

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    Re: 4th Order Wall Design Help Needed

    just do port/loading wall out of 2x4's and screw in until you have it right, then screw/glue...




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