New box

[opiate]

Howdy!

I've looked a few places for this without any luck. I know I'm going to sound really stupid. It's so stupid that I don't want to ask anyone face-to-face.

I'm transferring my car audio system from my car to my truck. I have a Toyota Tacoma XtraCab 4x4. My sub enclosure from my car will not fix into the cab of the truck so I need to build a new one.

2 JL Audio 10W0 subs in a sealed box. I called JL Audio tech support and got the dimensions. They told me for a sealed box I needed 1.5 cubic feet.

My question is, how do you measure a cubic foot? don't laugh...

[Cleetus]

HAhahahahahahahaaaaaaaaaa!!!!!!!!!

Honeslty, the cleetus would be the most clueless person on earth on that subject. He just wanted to be a butthead.

[opiate]

cubic foot? Anyone???

[kato2274]

I think you have to obtain one of those MAC G4 cubes. Since they were no good at computing they are now used for measurement.

1 length of g4 cube = 1 cubic foot.

[DocPC]

One cubic foot means 1 foot x 1 foot x 1 foot, or 1 foot to the third .

[kato2274]

here I don't want to be a complete jack@$$

http://groups.google.com/groups?q=di...ome.com&rnum=1

[Ya_know]

You need 18"X18"X8"=2592cubic inches, per speaker internally. (Or some variation of this)

The conversion from cubic feet to cubic inches is to multiply the cubic feet by 1728. 1728 is derived from 12X12X12=1728. Thusly, 1.5X1728=2592cubic inchesl.

Bare in mind also, these are internal dimensions. So the exterior of the box will be a little larger because of the width of the wood. I suggest no less than 5/8th inch plywood, but recommend 3/4 ply, or particleboard. Particleboard is the best, because it is far less porous than most plywood. But when you look at durability, quality 6ply plywood will withstand major car accidents better than all particleboard (learned this one from experience).

You will have to determine what will fit behind the seat, and what adjustments you can in dimensions to adhere to the resonation chamber requirements from the manufature.

[Ya_know]

Originally posted by kato2274
here I don't want to be a complete jack@$$

http://groups.google.com/groups?q=di...ome.com&rnum=1

That quote has some of the numbers reversed, it says to divide by 1278, but should say divide by 1728 when converting CI to CF.

[opiate]

Thanks kato2274 & Ya_Know....

I got it!

[opiate]

Originally posted by Ya_know
You need 18"X18"X8"=2592cubic inches, per speaker internally. (Or some variation of this)

The conversion from cubic feet to cubic inches is to multiply the cubic feet by 1728. 1728 is derived from 12X12X12=1728. Thusly, 1.5X1728=2592cubic inchesl.

Bare in mind also, these are internal dimensions. So the exterior of the box will be a little larger because of the width of the wood. I suggest no less than 5/8th inch plywood, but recommend 3/4 ply, or particleboard. Particleboard is the best, because it is far less porous than most plywood. But when you look at durability, quality 6ply plywood will withstand major car accidents better than all particleboard (learned this one from experience).

You will have to determine what will fit behind the seat, and what adjustments you can in dimensions to adhere to the resonation chamber requirements from the manufature.

Actually I'm going to mount my amp on the box and set it so the top of the amp is flush with the top of the enclosure. So, that will be a little ticky.

[Ya_know]

Don't go getting to fancy. My first box went into a Mark VIII. Because of the low rear cowl, and rise in the trunk for the gas tank, I couldn't mount twelve’s vertically. So I tried a horizontal setup; and though I could concoct a righteous bandpass solution with speakers side by side, instead of facing each other. I went so far as to dado cut slots into the inside sidewalls for the speaker platform, then put a lid over that, with ports coming from the lower chamber. It took me 4 hours, to produce the quietest box I have ever heard. I actually cried a little, I was so upset with the final product.

All because I thought I could get fancy. Acoustics is a science; so don’t tread on the specs too much. As long as you come as close to the chamber requirements as you can and keep everything clean inside, what you do on the outside won’t matter.

[kato2274]

Originally posted by Ya_know
\It took me 4 hours, to produce the quietest box I have ever heard. I actually cried a little, I was so upset with the final product.

Sissy. . . . . J/K

[Ya_know]

Originally posted by kato2274
Sissy. . . . . J/K

It's ok, you should have seen me ball like a baby when the car was rear-ender. It was totaled, and I wasn’t even moving. The new speaker box was stuck because of all of the wrinkled metal in the trunk floor; it took me 2 hours to get all of my stereo parts out because of this. I then roasted patches the whole way back to the salvage yard, and did my last doughnut in the parking lot.

[kato2274]

Originally posted by Ya_know
It's ok, you should have seen me ball like a baby when the car was rear-ender. It was totaled, and I wasn’t even moving. The new speaker box was stuck because of all of the wrinkled metal in the trunk floor; it took me 2 hours to get all of my stereo parts out because of this. I then roasted patches the whole way back to the salvage yard, and did my last doughnut in the parking lot.

the one I remember was when my old mustang over heated on the highway. I pulled over and watched all the cars move over into the left lane. as I was getting out some jack@$$ in a semi tried to pass a car on the right and his trailer swung slighty off the road, just enough to knick my driver side door shattering the window and flinging the door 50 ft in front of the car.

It was would've been comical to have me on tape holding the door up to the car trying to figure out how I was going to get it reattached. and the panic that set in when I realized I was 10 miles from an exit with no cell phone, and a car that was overheated missing a driver side door. then the realization hit me that I was lucky I wasn't killed and it was like emotional overload.