help with first time "REAL" box in 240sx hatch

[joemon]

im wanting to be tuned to 34 hz

would i be better of doing a

(my min. dimensions) 4.46cubic feet box with port sticking outta the box

or

(my max. dimensions) 6.685cubic feet box with port inside the box

[MIKE-2U]

Get chevyboy95 in here

[odsound]

this is her box i forget what i tuned it to the first time but it was in the high 30hz not a tall box because i didn't want the box to be to close to the hatch she only has 40 dollar woofers and an interfire amp rated at 600 watts rms at 2ohm and we have the ports firing back

[joemon]

whats the dimension of the box and whats the port volume?

[Joe X]

It all depends on what you can fit you need an internal net volume (Vb) around 3 cubic feet for those subs, so here is a design suggestion for those settings I have added a double baffle (top face) on those dims:

Enclosure Specifications:

Fb = 34 Hz

Vb = 3 ft^3

Subwoofer Mounting = Flush Mounted

External Height = 13 in

External Width = 26 1/4 in

External Depth = 25 in

Port Quantity and Dimensions:

Number of Ports = 2

Aero Port Diameter = 4

Aero Port Length = 16,591 in, 16 9/16 in

Vertical crossbracing is recommended as well. You can play around those dims with the Torres so see what you come up with.

In this suggestion the ports go fully inside the box.

Edited January 23, 2012 by Joe X

[joemon]

after more learning and reseaching and more playing around with the torres porgram i came up with this..

hows it look?

[chronic2001]

You need 3 4" ports like somewhere around 19" long to get enough port area and tuning freqency.

[chronic2001]

Port area range says 35-51". You have 25".

[chronic2001]

I might be off a tad I just did a 3.5 cuft box not a 3.9cuft but 3 4" ports put me right under 35hz n they were 19" long.

[joemon]

So hold on..

I need to do three 4in ports that all 3 are 19in long?

Or 19in total from the 3 ports?