J-

[BigBoomer 10+ year member]

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);\\--

Click to read more...

 

[BigBoomer 10+ year member]

Originally posted by Jmac These are external dimensions with 3/4" MDF, right ?

Partical board, i think. yes

 

[BigBoomer 10+ year member]

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...

 

[BigBoomer 10+ year member]

D///*\\\A///*\\\M///*\\\N

it didnt work... //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

well you know what a mean..

 

[BigBoomer 10+ year member]

Originally posted by Jmac You wanna do what now ?

//content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif I wanna build a box //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

...

...

...

Im thinking of building a cust. box (no program) //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

If yo have ever seen the back 'seat' of the 90' for ranger ext. cab, youll know what im talking about //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

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???????? //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

 

[BigBoomer 10+ year member]

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! //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

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

 

[BigBoomer 10+ year member]

ok.

NOW:

HOW DO I TUNE IT?????????????????????????????????????????????

 

[evo2k3 10+ year member]

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. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[BigBoomer 10+ year member]

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! //content.invisioncic.com/y282845/emoticons/satan.gif.9c6a335ed7aeeed3ee273e573f1fcaac.gif//content.invisioncic.com/y282845/emoticons/cool.gif.3bcaf8f141236c00f8044d07150e34f7.gif//content.invisioncic.com/y282845/emoticons/satan.gif.9c6a335ed7aeeed3ee273e573f1fcaac.gif

 

[BigBoomer 10+ year member]

cuz' i am a 13 yr old (almost)

 

[evo2k3 10+ year member]

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.

 

[BigBoomer 10+ year member]

 

[evo2k3 10+ year member]

Originally posted by BigBoomer

whats your deal man? in all honesty, how old are you?

 

[violator5spd 10+ year member]

apparently he's 92? //content.invisioncic.com/y282845/emoticons/satan.gif.9c6a335ed7aeeed3ee273e573f1fcaac.gif

 

[evo2k3 10+ year member]

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.