Im designing a box for my new improved build and i jus want to verify that im doing it all correctly. 

 

The box will be for two 15 inch SSA EVIL series subs. But for right now i have two dc lvl 4 15's that will go into the box temporarily. So it will be designed mainly around the EVIL's.

 

The car its going into is a 2007 Scion Tc. 

 

I measured out max dimensions and came up with a box that i think turned out very well. i wanted it tuned low, mid 30's and low 31's maybe. 

 

Heres what i came up with:::

Pic from sketchup 

 

 

(Copied and pasted from MS word)

Box Measurements Maximum limits for the SCION TC

 

                Width =    37 inch max (pushing)

 

                Depth =    38 inch max (also pushing)

 

                Height =     15 inch max after double baffled

 

                                14.25 inch height before baffle and 12.75 internal height for mounting depth

 

Subwoofer Displacement- .22 per sub (EVIL SSA 15) = .44 total

 

                                                                .21  per sub (DC LVL 4 15) = .42 total

 

 

 

Bracing Displacement = Using 2x4’s(1.5”x3.5”) = ( .125x.292x??? )

 

                Using max internal Height – Up and down bracing – 1.5”x3.5”x12.75”.039 CuFt x3 (Three braces)

 

                                Total displacement in CuFt = 0.117CuFt

 

                Using max Width internal – Side to side (Port wall to right wall) 1.5”x3.5”x35.5” .108CuFtx2(two braces)

 

                                Total displacement in CuFt = 0.216CuFt 

 

                Using max Depth internal – front to back bracing – 1.5”x3.5”x36.5” .111CuFtx2 (also two braces)

 

                                Total displacement in CuFt = 0.222CuFt

 

Box bracing displacement for max measurement specs – Total = 0.555 CuFt

 

               

 

Total Box Displacement for max dimensions including woofers and braces

 

                Using
SSA EVIL 15’s = .995 CuFt displacement

 

                Using
DC LVL 4 15’s = .975 CuFt displacement

 

 

 

8.1CUFT without displacement

 

7.105 cuft displacement with EVIL 15’s and bracing

 

7.125 cuft with dc 15’s and bracing

 

Port dimensions 12.75 H x 7.5 W =95.625sqin

 

                With
EVIL 15’s – SqIn of port per cuft = 13.5

 

                With DC
LVL 4 15’2 – SqIn of port per cuft = 13.4

 

Tuning with EVIL 15’s = 30.47 Hz tune

 

Tuning with DC 15’2 = 30.425 Hz tune

 

 

 

 

 

 

 

 

 

Does all of this look correct? Am i missing anything that is throwing me off or is this perfect? 

Are you walling it?

no. sub up port back

I highly doubt that you can properly fit two fifteens that way.

But I'm not very familiar with that car, maybe shizzon can chime in.

Well if all my math is correct, and the box that i built is correct, then shouldnt it all fit? 

How are you mounting the subs? it looks like you would have to mount them one behind eachother like that, or offset which would still be tight. 2 15's won't fit between 27 1/4"

i dont see how you plan on putting in your 4 dc 15's

i dont see how you plan on putting in your 4 dc 15's

 

He said 2 DC Lvl 4's lol

 

 

I highly doubt that you can properly fit two fifteens that way.

 

I kinda see it. They won't be side by side though. I'm thinking horizontally. They should fit fine

 

i dont see how you plan on putting in your 4 dc 15's

 

Not 4 DC's it's 2 DC lvl4's

 

I think Shizzon would definitely have your answer as far as room goes though. 

yah I was gonna stagger/offset them. that or jorizontal mount. I jus wanted to make sure my math was right and the tuning was correct.

yah I was gonna stagger/offset them. that or jorizontal mount. I jus wanted to make sure my math was right and the tuning was correct.

Something doesn't look right, I'll check back when I'm on my laptop.

Let me know asap. Im thinking about starting on the build soon.