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    BigBoomer's Avatar
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    J-

    Thinking of building a box for my 2 mtx thunder6000 12's
    Ported (not sure of the desing)

    Just one Q:
    How do you tune a port to 32Hz?????

    Or could i just port a 3.4 cu ft total(2 chambers)??

    --//;Oh, and dont trust old boxes that friend give to you ( prolly the reason is they got air leaks in em' and the dont want them anymore)(or at least thats what happend to me);\\--



    Subs: 2x Mtx Thunder 6000 12's
    Amp: 1x Kenwood Kac-629s 350w 2ch.
    The Rest ill just list the brand..i dont know the model #'s
    HU: Pioneer
    Fronts: Alpine
    Rears: Pioneer
    -------------------
    Ride: Ex. Cab Ford Ranger
    Brown. (yuck ) Auto trans.

    Ideas on truck to get 3 years from now? No Chevy!
    -------------------
    T exas
    C ross
    C ountry
    R acing
    A ccociation




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    Originally posted by Jmac
    These are external dimensions with 3/4" MDF, right ?
    Partical board, i think. yes



    Subs: 2x Mtx Thunder 6000 12's
    Amp: 1x Kenwood Kac-629s 350w 2ch.
    The Rest ill just list the brand..i dont know the model #'s
    HU: Pioneer
    Fronts: Alpine
    Rears: Pioneer
    -------------------
    Ride: Ex. Cab Ford Ranger
    Brown. (yuck ) Auto trans.

    Ideas on truck to get 3 years from now? No Chevy!
    -------------------
    T exas
    C ross
    C ountry
    R acing
    A ccociation

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    Originally posted by Jmac

    You have the dual voice coil version of the 6000s ?
    no, the single

    What would 10" instead of 7 1/2" depth do?

    and, is it a good idea to downfire the box(it sits about 5" off the floor) so just turn it upside down and put the ports on top(the exact opposite wall of the subs)


    Port Port
    __l_____________________l___
    I I I
    I I I
    I___________I______________I
    ^ subs ^

    let see if that turns out...



    Subs: 2x Mtx Thunder 6000 12's
    Amp: 1x Kenwood Kac-629s 350w 2ch.
    The Rest ill just list the brand..i dont know the model #'s
    HU: Pioneer
    Fronts: Alpine
    Rears: Pioneer
    -------------------
    Ride: Ex. Cab Ford Ranger
    Brown. (yuck ) Auto trans.

    Ideas on truck to get 3 years from now? No Chevy!
    -------------------
    T exas
    C ross
    C ountry
    R acing
    A ccociation

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    D///*\\\A///*\\\M///*\\\N
    it didnt work... :o
    well you know what a mean..



    Subs: 2x Mtx Thunder 6000 12's
    Amp: 1x Kenwood Kac-629s 350w 2ch.
    The Rest ill just list the brand..i dont know the model #'s
    HU: Pioneer
    Fronts: Alpine
    Rears: Pioneer
    -------------------
    Ride: Ex. Cab Ford Ranger
    Brown. (yuck ) Auto trans.

    Ideas on truck to get 3 years from now? No Chevy!
    -------------------
    T exas
    C ross
    C ountry
    R acing
    A ccociation

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    Originally posted by Jmac
    You wanna do what now ?
    I wanna build a box
    ...
    ...
    ...
    Im thinking of building a cust. box (no program)

    If yo have ever seen the back 'seat' of the 90' for ranger ext. cab, youll know what im talking about

    Im going to make complicated box to fit around the little curb thingy on the floor to the back wall.

    ---to make it short, how long does a port need to be: Tuned to around 32Hz????????



    Subs: 2x Mtx Thunder 6000 12's
    Amp: 1x Kenwood Kac-629s 350w 2ch.
    The Rest ill just list the brand..i dont know the model #'s
    HU: Pioneer
    Fronts: Alpine
    Rears: Pioneer
    -------------------
    Ride: Ex. Cab Ford Ranger
    Brown. (yuck ) Auto trans.

    Ideas on truck to get 3 years from now? No Chevy!
    -------------------
    T exas
    C ross
    C ountry
    R acing
    A ccociation

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    Ok! new design....

    Subs fire front, so do the ports.
    No idea what the vol.

    Heres the dims.:
    Front view:
    40" wide
    20" Tall (about the size of the 3/4" PLYWOOD(yup, plywood!)
    15" Deep
    All Dims. estimated at the moment.

    Side Dims.:
    kind of hard to describe:
    Too hard to describe!

    Just tell me how to tune a port to 32Hz (4" ports) or should go vented, and what size vent(s) to tune 32Hz



    Subs: 2x Mtx Thunder 6000 12's
    Amp: 1x Kenwood Kac-629s 350w 2ch.
    The Rest ill just list the brand..i dont know the model #'s
    HU: Pioneer
    Fronts: Alpine
    Rears: Pioneer
    -------------------
    Ride: Ex. Cab Ford Ranger
    Brown. (yuck ) Auto trans.

    Ideas on truck to get 3 years from now? No Chevy!
    -------------------
    T exas
    C ross
    C ountry
    R acing
    A ccociation

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    BigBoomer's Avatar
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    ok.
    NOW:
    HOW DO I TUNE IT?????????????????????????????????????????????



    Subs: 2x Mtx Thunder 6000 12's
    Amp: 1x Kenwood Kac-629s 350w 2ch.
    The Rest ill just list the brand..i dont know the model #'s
    HU: Pioneer
    Fronts: Alpine
    Rears: Pioneer
    -------------------
    Ride: Ex. Cab Ford Ranger
    Brown. (yuck ) Auto trans.

    Ideas on truck to get 3 years from now? No Chevy!
    -------------------
    T exas
    C ross
    C ountry
    R acing
    A ccociation

  8. #8
    evo2k3's Avatar
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    use the equations jmac was so nice to provide to calulcate port length:
    For a rectangular box ...
    H = Height
    W = Width
    D = Depth
    C = Thickness of MDF, fibreglass, or whatever the box is made of
    V = Volume
    P = Pi
    R = Radius
    S = Speaker displacement
    Vport = port volume
    Vslot = extra displacement of material used to create slot port
    Vbrace = displacement of braces used

    (H - 2C)(W - 2C)(D - 2C) - S - Vport - Vslot - Vbrace = Vbox
    P*R^2 = Port Area of a circular port
    Hport*Wport = Port area of a slot/rectangular port
    P*R^2*Dport = Port volume of a circular port
    Hport*Wport*Dport = Port volume of a slot/rectangular port
    Hport*C*Dport = Added displacement of slot port if wall is used as one of the sides of the port.
    Hport*2C*Dport = Added displacement of slot port if wall is not used as one of the sides of the port.

    one thing i know you want to void making a slot port with a ratio of h:w of more than 9:1....something about frication comeing into play then....hey and theres no need to act like a 13 year old and quote this 20 times please.




  9. #9
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    Originally posted by evo2k3
    use the equations jmac was so nice to provide to calulcate port length:
    For a rectangular box ...
    H = Height
    W = Width
    D = Depth
    C = Thickness of MDF, fibreglass, or whatever the box is made of
    V = Volume
    P = Pi
    R = Radius
    S = Speaker displacement
    Vport = port volume
    Vslot = extra displacement of material used to create slot port
    Vbrace = displacement of braces used

    (H - 2C)(W - 2C)(D - 2C) - S - Vport - Vslot - Vbrace = Vbox
    P*R^2 = Port Area of a circular port
    Hport*Wport = Port area of a slot/rectangular port
    P*R^2*Dport = Port volume of a circular port
    Hport*Wport*Dport = Port volume of a slot/rectangular port
    Hport*C*Dport = Added displacement of slot port if wall is used as one of the sides of the port.
    Hport*2C*Dport = Added displacement of slot port if wall is not used as one of the sides of the port.

    one thing i know you want to void making a slot port with a ratio of h:w of more than 9:1....something about frication comeing into play then....hey and theres no need to act like a 13 year old and quote this 20 times please.
    Originally posted by evo2k3
    use the equations jmac was so nice to provide to calulcate port length:
    For a rectangular box ...
    H = Height
    W = Width
    D = Depth
    C = Thickness of MDF, fibreglass, or whatever the box is made of
    V = Volume
    P = Pi
    R = Radius
    S = Speaker displacement
    Vport = port volume
    Vslot = extra displacement of material used to create slot port
    Vbrace = displacement of braces used

    (H - 2C)(W - 2C)(D - 2C) - S - Vport - Vslot - Vbrace = Vbox
    P*R^2 = Port Area of a circular port
    Hport*Wport = Port area of a slot/rectangular port
    P*R^2*Dport = Port volume of a circular port
    Hport*Wport*Dport = Port volume of a slot/rectangular port
    Hport*C*Dport = Added displacement of slot port if wall is used as one of the sides of the port.
    Hport*2C*Dport = Added displacement of slot port if wall is not used as one of the sides of the port.

    one thing i know you want to void making a slot port with a ratio of h:w of more than 9:1....something about frication comeing into play then....hey and theres no need to act like a 13 year old and quote this 20 times please.
    Originally posted by evo2k3
    use the equations jmac was so nice to provide to calulcate port length:
    For a rectangular box ...
    H = Height
    W = Width
    D = Depth
    C = Thickness of MDF, fibreglass, or whatever the box is made of
    V = Volume
    P = Pi
    R = Radius
    S = Speaker displacement
    Vport = port volume
    Vslot = extra displacement of material used to create slot port
    Vbrace = displacement of braces used

    (H - 2C)(W - 2C)(D - 2C) - S - Vport - Vslot - Vbrace = Vbox
    P*R^2 = Port Area of a circular port
    Hport*Wport = Port area of a slot/rectangular port
    P*R^2*Dport = Port volume of a circular port
    Hport*Wport*Dport = Port volume of a slot/rectangular port
    Hport*C*Dport = Added displacement of slot port if wall is used as one of the sides of the port.
    Hport*2C*Dport = Added displacement of slot port if wall is not used as one of the sides of the port.

    one thing i know you want to void making a slot port with a ratio of h:w of more than 9:1....something about frication comeing into play then....hey and theres no need to act like a 13 year old and quote this 20 times please.
    Originally posted by evo2k3
    use the equations jmac was so nice to provide to calulcate port length:
    For a rectangular box ...
    H = Height
    W = Width
    D = Depth
    C = Thickness of MDF, fibreglass, or whatever the box is made of
    V = Volume
    P = Pi
    R = Radius
    S = Speaker displacement
    Vport = port volume
    Vslot = extra displacement of material used to create slot port
    Vbrace = displacement of braces used

    (H - 2C)(W - 2C)(D - 2C) - S - Vport - Vslot - Vbrace = Vbox
    P*R^2 = Port Area of a circular port
    Hport*Wport = Port area of a slot/rectangular port
    P*R^2*Dport = Port volume of a circular port
    Hport*Wport*Dport = Port volume of a slot/rectangular port
    Hport*C*Dport = Added displacement of slot port if wall is used as one of the sides of the port.
    Hport*2C*Dport = Added displacement of slot port if wall is not used as one of the sides of the port.

    one thing i know you want to void making a slot port with a ratio of h:w of more than 9:1....something about frication comeing into play then....hey and theres no need to act like a 13 year old and quote this 20 times please.
    Originally posted by evo2k3
    use the equations jmac was so nice to provide to calulcate port length:
    For a rectangular box ...
    H = Height
    W = Width
    D = Depth
    C = Thickness of MDF, fibreglass, or whatever the box is made of
    V = Volume
    P = Pi
    R = Radius
    S = Speaker displacement
    Vport = port volume
    Vslot = extra displacement of material used to create slot port
    Vbrace = displacement of braces used

    (H - 2C)(W - 2C)(D - 2C) - S - Vport - Vslot - Vbrace = Vbox
    P*R^2 = Port Area of a circular port
    Hport*Wport = Port area of a slot/rectangular port
    P*R^2*Dport = Port volume of a circular port
    Hport*Wport*Dport = Port volume of a slot/rectangular port
    Hport*C*Dport = Added displacement of slot port if wall is used as one of the sides of the port.
    Hport*2C*Dport = Added displacement of slot port if wall is not used as one of the sides of the port.

    one thing i know you want to void making a slot port with a ratio of h:w of more than 9:1....something about frication comeing into play then....hey and theres no need to act like a 13 year old and quote this 20 times please.
    Originally posted by evo2k3
    use the equations jmac was so nice to provide to calulcate port length:
    For a rectangular box ...
    H = Height
    W = Width
    D = Depth
    C = Thickness of MDF, fibreglass, or whatever the box is made of
    V = Volume
    P = Pi
    R = Radius
    S = Speaker displacement
    Vport = port volume
    Vslot = extra displacement of material used to create slot port
    Vbrace = displacement of braces used

    (H - 2C)(W - 2C)(D - 2C) - S - Vport - Vslot - Vbrace = Vbox
    P*R^2 = Port Area of a circular port
    Hport*Wport = Port area of a slot/rectangular port
    P*R^2*Dport = Port volume of a circular port
    Hport*Wport*Dport = Port volume of a slot/rectangular port
    Hport*C*Dport = Added displacement of slot port if wall is used as one of the sides of the port.
    Hport*2C*Dport = Added displacement of slot port if wall is not used as one of the sides of the port.

    one thing i know you want to void making a slot port with a ratio of h:w of more than 9:1....something about frication comeing into play then....hey and theres no need to act like a 13 year old and quote this 20 times please.
    Originally posted by evo2k3
    use the equations jmac was so nice to provide to calulcate port length:
    For a rectangular box ...
    H = Height
    W = Width
    D = Depth
    C = Thickness of MDF, fibreglass, or whatever the box is made of
    V = Volume
    P = Pi
    R = Radius
    S = Speaker displacement
    Vport = port volume
    Vslot = extra displacement of material used to create slot port
    Vbrace = displacement of braces used

    (H - 2C)(W - 2C)(D - 2C) - S - Vport - Vslot - Vbrace = Vbox
    P*R^2 = Port Area of a circular port
    Hport*Wport = Port area of a slot/rectangular port
    P*R^2*Dport = Port volume of a circular port
    Hport*Wport*Dport = Port volume of a slot/rectangular port
    Hport*C*Dport = Added displacement of slot port if wall is used as one of the sides of the port.
    Hport*2C*Dport = Added displacement of slot port if wall is not used as one of the sides of the port.

    one thing i know you want to void making a slot port with a ratio of h:w of more than 9:1....something about frication comeing into play then....hey and theres no need to act like a 13 year old and quote this 20 times please.
    Originally posted by evo2k3
    use the equations jmac was so nice to provide to calulcate port length:
    For a rectangular box ...
    H = Height
    W = Width
    D = Depth
    C = Thickness of MDF, fibreglass, or whatever the box is made of
    V = Volume
    P = Pi
    R = Radius
    S = Speaker displacement
    Vport = port volume
    Vslot = extra displacement of material used to create slot port
    Vbrace = displacement of braces used

    (H - 2C)(W - 2C)(D - 2C) - S - Vport - Vslot - Vbrace = Vbox
    P*R^2 = Port Area of a circular port
    Hport*Wport = Port area of a slot/rectangular port
    P*R^2*Dport = Port volume of a circular port
    Hport*Wport*Dport = Port volume of a slot/rectangular port
    Hport*C*Dport = Added displacement of slot port if wall is used as one of the sides of the port.
    Hport*2C*Dport = Added displacement of slot port if wall is not used as one of the sides of the port.

    one thing i know you want to void making a slot port with a ratio of h:w of more than 9:1....something about frication comeing into play then....hey and theres no need to act like a 13 year old and quote this 20 times please.

    Too Bad!



    Subs: 2x Mtx Thunder 6000 12's
    Amp: 1x Kenwood Kac-629s 350w 2ch.
    The Rest ill just list the brand..i dont know the model #'s
    HU: Pioneer
    Fronts: Alpine
    Rears: Pioneer
    -------------------
    Ride: Ex. Cab Ford Ranger
    Brown. (yuck ) Auto trans.

    Ideas on truck to get 3 years from now? No Chevy!
    -------------------
    T exas
    C ross
    C ountry
    R acing
    A ccociation

  10. #10
    BigBoomer's Avatar
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    cuz' i am a 13 yr old (almost)



    Subs: 2x Mtx Thunder 6000 12's
    Amp: 1x Kenwood Kac-629s 350w 2ch.
    The Rest ill just list the brand..i dont know the model #'s
    HU: Pioneer
    Fronts: Alpine
    Rears: Pioneer
    -------------------
    Ride: Ex. Cab Ford Ranger
    Brown. (yuck ) Auto trans.

    Ideas on truck to get 3 years from now? No Chevy!
    -------------------
    T exas
    C ross
    C ountry
    R acing
    A ccociation

  11. #11
    evo2k3's Avatar
    evo2k3 is offline Senior Bizznitch



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    Originally posted by BigBoomer
    cuz' i am a 13 yr old (almost)
    come on man....i gave you some info that jmac gave me and made a simple request....there really is no need to that here.




  12. #12
    BigBoomer's Avatar
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    :p :p :p :p :p :p



    Subs: 2x Mtx Thunder 6000 12's
    Amp: 1x Kenwood Kac-629s 350w 2ch.
    The Rest ill just list the brand..i dont know the model #'s
    HU: Pioneer
    Fronts: Alpine
    Rears: Pioneer
    -------------------
    Ride: Ex. Cab Ford Ranger
    Brown. (yuck ) Auto trans.

    Ideas on truck to get 3 years from now? No Chevy!
    -------------------
    T exas
    C ross
    C ountry
    R acing
    A ccociation

  13. #13
    evo2k3's Avatar
    evo2k3 is offline Senior Bizznitch



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    Originally posted by BigBoomer
    :p :p :p :p :p :p
    whats your deal man? in all honesty, how old are you?




  14. #14
    violator5spd's Avatar
    violator5spd is offline Post Wh0re Hunter



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    apparently he's 92?



    - John (AIM - ViolatorJF)

    2000 Dodge Neon

    DEH-P9300, JBL BP600.1, eD15A.22 in 2.5^3ft sealed

  15. #15
    evo2k3's Avatar
    evo2k3 is offline Senior Bizznitch



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    yeah i read his profile too....so mabey he is just a senile old man, or a teen...i dont know, either way he shouldn't be driving, much less building a system.




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