Box for 4 15 inch obsidians!! ur opinions?

[alenv10]

Yea i just measured, deff way more space then that bro

[321slapinbass]

you are measuring the floor.... you need to measure from the top of the rear seat's headrest since your box will be 20" tall and the seats are not straight up. so from the headrest to the rear hatch there is about 45", and your port is 6" tall so you need to leave 6" of space between the box and hatch in order for your port to breath. this means your box can only be 39" deep, UNLESS YOU DO SUB UP PORT UP then you could do about 44" deep

[321slapinbass]

I would do this:

13.34 cubes @ 34.16hz

box: 44 x 20 x 39 = 17 cubes

port: 38 x 5 x 21.5 = 34.16 hz , 14.24in^2 per cube, displacement of 2.72 cubes

subs: displacement of .74 cubes

bracing: displacement of .2 cubes

17 - 2.72 = 14.28

14.28 - .74 = 13.54

13.54 - .2 = 13.34

so your box will be 13.34 cubes (3.33 each) tuned to 34.16hz with 14.24in^2 of port per cube.

I would also suggest making the top a double baffle, but that's easy, just add the 2nd layer on top when the box is done. this will make it 20.75" total height.

EDIT : I changed the specs for a higher tuning and more airspace.

[Swordlordboy1234]

Wall it

[mrd6]

what is your port orientation? I would try port across the bottom of the box and tune a bit higher around 34-35 (get some air space back from shorte port). If your port only has a height of 4-5 inches then you only need to be about 5-6 inches away from the tail gate. With the port loading like this your in car tuning will drop as well since the tail gate acts as an extension of the port and you keep your lows. See what you can come up with that way, bet you can get to 14-15 cubes net...

edit: this may already be how your port is going to look, i dont know how the whole shared wall thing in torres works, I never use it that way

[321slapinbass]

Wall it

haha or this. thats why I haven't done 4 15's yet because I don't want to go above the window line in the rear and thats hard to do with 4 15's ported.

[321slapinbass]

what is your port orientation? I would try port across the bottom of the box and tune a bit higher around 34-35 (get some air space back from shorte port). If your port only has a height of 4-5 inches then you only need to be about 5-6 inches away from the tail gate. With the port loading like this your in car tuning will drop as well since the tail gate acts as an extension of the port and you keep your lows. See what you can come up with that way, bet you can get to 14-15 cubes net...

edit: this may already be how your port is going to look, i dont know how the whole shared wall thing in torres works, I never use it that way

yeah he wants the port across the bottom. the box I suggested has a port across the bottom that's 5" tall with 6" from the rear hatch.

EDIT - check out post #13, I changed some things around

[CleanSierra]

You have a shitload of cone area, you don't need to tune 30 to have astonishing lows, especially in an SUV. Tune to 35 and you'll be fine, unless you're looking for a wind machine, and if that's the case, you should be walling anyway. Anything over 12 cubes should be fine. A larger box definitely has the tendency to be more efficient, just start being careful if you plan to overpower your subs. More air equals less backpressure and less cone control. Your port area numbers look good though and the concept of what you're doing is sounding good too