Help Designing Subwoofer Box

[Mitchell112694]

ok so i have 4 Rockford Fosgate 12" P3's (newest models P3D412) and i would like to create a box for all 4 to go into, i have only bought already built ones before and have never built one so i have no idea where to start

i would like to have them facing up and I'm not sure if its better to have separate chambers for each or just have them all share one

my MAX dimensions are 24" in Depth, 46" in Width, 21" Height (can be a little higher, just not higher then 24")

if you guys can help out that would be greatly appreciated!!

[Spencer Good]

What amp are you powering them with and what kind of vehicle is this going into?

[Mitchell112694]

What amp are you powering them with and what kind of vehicle is this going into?

its going into a 2004 ford escape and a 5000 watt planet audio mono amp (1ohm stable) for now untill i upgrade to a fosgate amp

[Joe X]

Here is a suggestion, any changes let me know:

Enclosure Specifications:

Fb = 35 Hz

Vb = 6.9 ft^3

External Height = 21 in

External Width = 46 in

External Depth = 20 in

Port Width = 28 in

Port Height = 3 1/2 in

Cut Sheet List:

* All Dimensions in Inches.

* Wood Thickness is 3/4 for all Parts.

External Enclosure Parts:

2 x Top & Bottom (3 parts) = 46 x 20

Left & Right Sides = 18 1/2 x 18 3/4

Front & Back = 46 x 18 3/4

L Port Internal Assembly Parts:

Front to Back = 15 x 29 1/2

Extension = 1 x 29 1/2

Port Left Side Assembly:

15 x 3 1/2

5 1/4 x 3 1/2

Port Right Side Assembly:

15 x 3 1/2

5 1/4 x 3 1/2

Assembly guide (generic dimensions):

[Mitchell112694]

Here is a suggestion, any changes let me know:

Enclosure Specifications:

Fb = 35 Hz

Vb = 6.9 ft^3

External Height = 21 in

External Width = 46 in

External Depth = 20 in

Port Width = 28 in

Port Height = 3 1/2 in

Cut Sheet List:

* All Dimensions in Inches.

* Wood Thickness is 3/4 for all Parts.

External Enclosure Parts:

2 x Top & Bottom (3 parts) = 46 x 20

Left & Right Sides = 18 1/2 x 18 3/4

Front & Back = 46 x 18 3/4

L Port Internal Assembly Parts:

Front to Back = 15 x 29 1/2

Extension = 1 x 29 1/2

Port Left Side Assembly:

15 x 3 1/2

5 1/4 x 3 1/2

Port Right Side Assembly:

15 x 3 1/2

5 1/4 x 3 1/2

Assembly guide (generic dimensions):

thankyou soooo much!!!

[r.hughes]

Okay, I am building a box for four RF P1S415. I want them facing upward with a vent at bottom of enclosure. Max W is 50" Max D is 20" & H isn't a problem. I'm installing it in a 1994 Chevy Astro Van. Help!

[Joe X]

You can't place four 15 subs in a 50"x20" baffle, you can do 3 though. Also you can take out the third row or do 4 12s as above.

[CleanSierra]

You can't place four 15 subs in a 50"x20" baffle, you can do 3 though. Also you can take out the third row or do 4 12s as above.

He has an Astro van, he has the height. Wall P1 Fosgate subs? Why the Hell not?

[r.hughes]

Joe X, you're absolutely right. It's a '94 Astro EXT also. I have enough room to put four 15's without taking the 3rd row out. My original measurements were W 50" , D 40" , H 28". Should be about 5.00 cube ft2 per chamber. 10" vent across bottom with all four 15's firing up. Please leave your suggestions. Thanks

[Trentonet]

I have a 2007 hhr. Recently I bought 2 sundown e8 v4 d2. I built a box that was recommended for one and it sounds great! I see an upgrade to an Sa or x in my future.. I would like to know if anyone has built a custom box for two of them that will fit in the spare tire section in the back. I work out of it in construction and constantly have tools in there! Bad news for speakers... I've only had it in there for one day and already see problems happening ( acord end dangling in front of it makes a horrible sound during exertion) anyway I have my amps and crossovers under there it keeps them safe. A box design vented and tuned to 35 hz would be awesome to or lower. Any info I need to supply I will gladly find out. Thank you for ya'lls help in this matter...