help on 15 fi btl enclousure design

[trevino_88 0]

hello I would like a design for a single with dimensions of 17H, 40W , & 18D Mmaybe alll the WAY to 22 but sub will be to close to trunk wall ... on you tube thers a design double port the guy has It on a civic very nice.oh and tuned to 33 to 35

[Bearlokey13 2]

Try any of these guys. Or Argent Audio or the SSA store.

[KU40 173]

If you also want a dual port setup, make each port 15.5" tall (height of inside of box) and 2" wide, by 31.5" long. That'll give you about 4 cubes net tuned to 34 hz. that's with the 17x40x18 box.

[trevino_88 0]

thanks midnight thunder, but what would I have to increase to get the 5.0cuft or more. can do the 20 D and maybe 18 tall sorry , is 1 cu ft much of a difference ? its going to be set on a CROWN VICTORIA, THABKS FOR YOUR TIME

[trevino_88 0]

is 31.5" long for both sides ? or 31.5/ 2... any 45 angles ?i want something like this

YouTube - Fully Loaded 15" Fi BTL Subwoofer, Flex, Excursion

[KU40 173]

Yes, each port would need to be 31.5" long.

You can do 5 cubes @ 34 hz with a box that's 18"h x 40"w x 20"d with two 2"w x 16.5"h ports that are 26" deep each.

[trevino_88 0]

18x20x40 thats the outter dimentions(including the wood thickness)or thoes dimentions plus TOW.is that including BTL's hixmax coil displacement?thanks for your help!!

[trevino_88 0]

Oh oh is it better double port or just a single port?

[KU40 173]

Yes those are outside dimensions, and it doesn't matter if you have one port or two. You said you wanted a double port so I designed it with them. That design has 6.8 cubes gross, minus 1.35 cubes for port displacement, and .45 cubes for sub displacement.

[trevino_88 0]

How come in fi's website shows that 15 btl has as .21cuft displacment.where did you got the .45 cuft?can i add 45's on the corner of the ports thanks KU40

[KU40 173]

I guessed. And it doesn't matter. The .03 cubic feet between my guesstimated .45 cubes and the actual .42 cubes won't make a difference. And yes you can do what you want.