Box size help

[BlueChrome]

When making a fiberglass sub box, how would I get the airspace right? Like whats the right math to use?

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[tRiGgEr 5,000+ posts]

When making a fiberglass sub box, how would I get the airspace right? Like whats the right math to use?

There is no formula for figuring out an unubtanable solution.

But you can fill the mold with a solid substance and measure it. Dump a pound of sand in there and go from there...

Edit - If you need to know how big to make it before hand just rough estimate the dimmensions. And work from there.

 

[BlueChrome]

There is no formula for figuring out an unubtanable solution.
But you can fill the mold with a solid substance and measure it. Dump a pound of sand in there and go from there...

Edit - If you need to know how big to make it before hand just rough estimate the dimmensions. And work from there.

Thanks, that helps more than you know it haha

 

[SSS 18734 5,000+ posts]

fill it with water and measure the liters

 

[BlueChrome]

Now if it comes out under or over the airspace specs, am I SOL, or is there a way to correct it?

 

[954runner 10+ year member]

packing peanuts may be easier than sand.

 

[tRiGgEr 5,000+ posts]

Now if it comes out under or over the airspace specs, am I SOL, or is there a way to correct it?

Adding a solid item, say 2x4 wood or left over MDF laying around will decrease the internal volume.

For a box to small, adding some polyfill will help.

 

[BlueChrome]

Adding a solid item, say 2x4 wood or left over MDF laying around will decrease the internal volume.
For a box to small, adding some polyfill will help.

Thanks again