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nicholasrhall

I need some design help for my box

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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 

 

bhm612.png

 

(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? 

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Are you walling it?

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

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

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

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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"

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

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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. 

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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.

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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.

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