Box tunning?

[Gil Loyola]

I have a few questions

1. Lets say i have a box that is 10 cubic foot internal volume is that the gross volume of the box.

2. When tunning this box do i plug into the port calculator my box volume of 10 cubic foot or would i have to subtract woofer displacement and bracing first and then put that volume as my box volume

[Aj11]

would subtract, but ten cubic feet? what are you running?

[CleanSierra]

Give dimensions, that way we can help. You bought as well also provide equipment being used, like subwoofer brand and model, the amp or amps that will be pushing them, and what vehicle. Provide dimensions, what music you listen, and anything you can think of.

[Gil Loyola]

Give dimensions, that way we can help. You bought as well also provide equipment being used, like subwoofer brand and model, the amp or amps that will be pushing them, and what vehicle. Provide dimensions, what music you listen, and anything you can think of.

Outer dimmensions of the box are 36w X 14h X 44 d Thats 10.6 internal ft^3 if the math is correct. Its going inside of a 99 mustang. Woofer is a 18" RE SX maximum ported box recomended is 8cubes.

The port i wanted 10w X 12.4h X 26d not sure really how the port calculator works but i put the box volume to be 10.6cubes and then 10w by 12.4h and it gave me 26d to be ported at 30hz

i want to hit the lows 35hz - 20hz for like slowed music and chopped

I subtracted the port...sub....and bracing and the box is now at 8.16ft^3

For tunning correctly do i use 8 cubes and then when i have the port size tunned for 8cubes then i add that too the box im confused

[CleanSierra]

You Subtract the port before doing the calculation for port length, so go with your 8 cubes. When I do the math, roughly, I get that the port takes up 2.14 cubes( since you don't have to add 1.5" to your port dimension to find displacement because one of your measurements is the wall of the box, therefore you only add .75" for wood thickness of the port wall) leaving you with your 8.46 cubes. 8.46 and THOSE port measurements should put you in the 31-32 Hz range which is perfectly fine. You still have to about for sub and bracing displacement. I have double checked the numbers and they check out. To get down to 30Hz range, another 6-8 inches must be added in port length. You'll eat up half a cubic foot doing that and it's not worth it.

Side note: How the hell do you really plan on getting a box THAT big into a Mustang trunk? Obviously it would have to be built in the truck and the sub would be firing up and the trunk lid. This isn't an ideal way to setup your sub stage. You're gonna have trunk rattle like a motherfucker.

[Joe X]

A 18" in a trunk car... good luck... and lots of deadener.

[jarrius]

How are you goin to put a 18in sub in a box that's only 14in tall? Only way I see is sub firing up and that is not really a good idea lol

36w X 14h X 44 d is that your correct dimenrions?

[TortoiseShore]

How are you goin to put a 18in sub in a box that's only 14in tall? Only way I see is sub firing up and that is not really a good idea lol

36w X 14h X 44 d is that your correct dimenrions?

It's a PITA lol. Not impossible, but I'm not sure about a mustang though. This is only 15" tall, had a guy tell me I couldn't do it.

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[slamingsuburban]

so dont tell you it cant be done lol thats got to be a pain to load

[TortoiseShore]

so dont tell you it cant be done lol thats got to be a pain to load

Oh it was lol. Couldnt put the sub on before putting it in so getting the sub through the gap was awful. But it could have been worse. Probably was only possible because Obsidian's need so little space