how do you go about guaging how much airspace you'll have in a fibreglass enclosure? I am basically doing giant kickpanels for my sub-boxes in my truck, and want to have a reasonably accurate way of figuring this out, without actually having to calculate too much.
Is this possible?
The subs I'm using need roughly 1 ft/cube each, so if it is simply close to that will it be ok?

Will I be guess-timating, or what?

 

once it is built, fill it with something like packagine styrofoam, then measure the foam after.

 

Or, once it's built take it out of the car if you can and fill it with water. To get the most accuracy, use a graduated measuring cup. Mark and count how many litres you put in until it's completely full.

Keep in mind: 1 cu ft = 28.317 liters

Take your total liter amount and divide it by 28.317

[img]smile.gif[/img]

 

I suppose only once you'll be done your fibreglass enclosure, then you'll know what enclosure size you'll have when you measure it. So I guess you'd be going a bit backwards on it. [img]graemlins/freak.gif[/img]

A bit of trial and error needed there.

 

As I was scoping out my car so I could figure out where to mount my woofers I had a plastic bag filled with packing peanuts to the optimum volume. I kept shoving the bag in voids and crannies to see where I could and could not put the woofers. Crude but inexpensive and effective.

 

cool boys, like chadxton said though, a bit backwards....

thanks for the advice

 

Once youve molded the box, and measured the volume (taking into account the woofers intermal volume), you can remove extra volume easilly by adding a filler. If you need to make it bigger...

 

its generally alot easier at this point to subtract airspace, then to add.

 

Screwing up a glass box has got to be a pain and expensive.