Sorry for the long post!
Before I start cutting my port holes I wanted to double check to see if I am doing it properly.
I am building 2 wedge type enclosures, each housing one Type R dual 4ohm running at 2 ohms.
This is the style enclosure I am building:
http://www.the12volt.com/images2/wedwdh2_.gif (sorry for not being able to paste the image)
My dimensions are to be
Height 1= 19"
This will put be at appx. 2.5 cubes
As the consensus around the forum seems to be 2.5 cubes tuned at 32hz this is what I am after.
I am putting 450rms on each speaker (I know, some say to put more but for this season I am already over invested)
I am using 4" precision ports for my porting.
When I plug my numbers into the calculator at precision port, http://www.psp-inc.com/
I get the formula that by using one port, my length needs to be 11.30"; by using two ports my length needs to be 24.53"
Does this mean that by using two ports, EACH port needs to be 24.53" or total port length needs to be 24.53" so each port would be half of that?
Would it be better to use one port or two ports on each single enclosure?
On to firing direction.
The boxes will sit in my engine compartment on each side of the engine.
The box will be oriented as it is in the picture of the wedge.
I can only fire either out of the front of the box which is the angle side where the woofer will be placed or out of the back side (height 1).
From the front side of the box to the rear seat I have approximately 15" of space.
From the rear of the box to the back of the hull of the boat I have approximately 18" inches of space.
How many ports and where to fire them?
Thanks so much for the help