[ricardojoa]

So assume i modeled the woofer with a 30 liter requirements, does that mean i need to buil the box slightly larger to accomodate drives displacement and bracing? I guess yes, but just need a little confirmation.

Thanks

[Muser]

Your answer is here : http://www.hometheatershack.com/forums/enclosure-volume-calculator/
Drivers and ports "shrink" the volume.
Hope the link helps you.

[FullRangeMan]

Many pro audio raw speakers brands inform the vol displaced by its drivers.
Usually the vol box recommended by an manufacturer for its project/drivers are the gross vol.